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 Publications-2011 |
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Thermal diffusivity of rhodamine 6G incorporated in silver nanofluid measured using mode-matched thermal lens technique ,
Santhi Ani Joseph, Misha Hari, S. Mathew, Gaurav Sharma, Soumya, V.M. Hadiya, P. Radhakrishnan, V.P.N. Nampoori, Optic. Comms; 283, 313–317 (2010). |
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Photothermal characterization of nanogold under conditions of resonance excitation and energy transfer,
Santhi Ani Joseph, S. Mathew, Gaurav Sharma, Misha Hari, P. Radhakrishnan, V.P.N. Nampoori, Plasmonics (2010) DOI: 10.1007/s11468-009-9116-0 |
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Laser induced Bessel beams can realize fast all-optical switch in gold nanosol prepared by pulsed laser ablation,
Santhi Ani Joseph, Gaurav Sharma, Misha Hari, S. Mathew, P. Radhakrishnan, V. P .N. Nampoori, JOSA B ( 2010) |
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Photoinduced changes in optical properties of Ga–Sb–Ge–Se glasses,
R.Tintu , V.P.N. Nampoori, P. Radhakrishnan, Sheenu Thomas ; Optics Communications 284 (2011) 222–225. |
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Nonlinear optical studies on nanocolloidal Ga–Sb–Ge–Se chalcogenide Glass,
R.Tintu, V. P. N. Nampoori, P. Radhakrishnan, and Sheenu Thomas; Journal of Applied Physics 108, 073525 (2010). |
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Preparation and optical characterization of novel Ge–Se–Sb/PVA composite films for optical limiting application,
R. Tintu , V.P.N. Nampoori, P. Radhakrishnan, Sheenu Thomas ; J. Phys. D: Appl. Phys. 44 (2011) 025101. |
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Ge28Se60Sb12 /PVA composite films for photonic applications,
R Tintu, K Sulakshna ,K Saurav, V P N Nampoori, P Radhakrishnan and Sheenu Thomas ; Journal of Non-Oxide Glasses Vol. 2, No 4( 2010) p. 167- 174 |
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Effect of deoxyribonucleic acid on nonlinear optical properties of Rhodamine 6G- polyvinyl alcohol solu-tion,
B. Nithyaja, H. Misha, P. Radhakrishnan, and V. P. N. Nampoori; Journal of Applied Physics 109, 023110 (2011) |
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Nonlinear Optical Characterization of erbium doped Ge- Sb- Se thin films,
R. Tintu , V.P.N. Nampoori, P. Radhakrishnan, Sheenu Thomas; Discourse - Science (In press) |
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Students Chapter in Universities: Their Role in the School Level Technology Enabled Science Education.,
Praveen Cheriyan Ashok, V.P.N Nampoori; Educational Quest, Vol. No. 1.1,(33-37)(2010) |
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The Effect of Grating Period on Refractive Index Sensitivity of Long Period
Gratings Written in Hydrogen Loaded SMF-28 Fiber, T. M. Libish, M. C.
Bobby, J. Linesh, P. Biswas, S. Bandyopadhyay, K. Dasgupta, P. Radhakrishnan,
Journal Of Optoelectronics and advanced Materials, Vol. 13, Issue 5, May
2011, pp. 491-496. |
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Optical Non-linearity in ZnO Doped TeO2 Glasses, Rose Leena Thomas,
Vasuja, Misha Hari, V. P.N. Nampoori, P. Radhakrishnan, Sheenu Thomas,
Journal Of Optoelectronics and advanced Materials, Vol. 13, Issue 5, May
2011, pp. 523-527. |
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Shifting of Fluorescence Peak in CdS Nanoparticles by Excitation Wavelength
Change, Mathew S, Ani Joseph S, Radhakrishnan P, Nampoori V P,
Vallabhan C P, J Fluoresc. 2011 Jan 19. |
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Periodically Tapered LPFG for Ethanol Concentration Detection in
Ethanol-Gasoline Blend, J. Linesh, T. M. Libish, M. C. Bobby, P.
Radhakrishnan and V. P. N. Nampoori, Sensors & Transducers Journal, Vol.
125, Issue 2, February 2011, pp. 205-212. |
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Detection and Analysis of Paraffin oil Adulteration in Coconut oil Using
Fiber Optic Long Period Grating Sensor, T.M. Libish, J. Linesh,
M.C.Bobby, P.Biswas, S. Bandyopadhyay, K.Dasgupta, P.Radhakrishnan, Optik-International
Journal for Light and Electron Optics, doi:10.1016/j.ijleo.2010.12.009. |
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Fiber Bragg Grating Sensor for Detection of Nitrate Concentration in Water,
A. S. Lalasangi, J. F. Akki, K.G. Manohar, T. Srinivas, P. Radhakrishnan,
Sanjay Kher, N. S. Mehla and U. S. Raikar, Sensors & Transducers Journal,
Vol. 125, Issue 2, February 2011, pp. 187-193. |
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Nanocomposite thin films of Ga5Sb10Ge25Se60 chalcogenide glass for optical
limiting applications , R. Tintu , V.P.N. Nampoori , P. Radhakrishnan,
Sheenu Thomas ,Optical Materials 33 (2011) pp.1221–1225. |
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Publications-2010 |
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Spectral and Nonlinear optical Characteristics of ZnO Nanocomposites,
Litty irimpan, V. P .N. Nampoori and P. Radhakrishnan,Science Of Advaced
Materials,Vol.2, 117-137,2010. |
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Matagels thin film based magnetostictive transducers for use in long period
grating sensors, Sony Thomas,Jinesh Mathew, Anantharaman,V. P .N.
Nampoori, P. Radhakrishnan, Sensors and Actuaters-A,2010 (In press). |
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Fiber Optic Long Period Grating Based Sensor for Coconut Oil Adulteration
Detection, T.M.Libish , J.Linesh, P. Biswas, S. Bandyopadhyay, K.
Dasgupta and P. Radhakrishnan,Sensors & Transducers Journal, Vol. 114, Issue
3, March 2010, pp. 102-111 |
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LIQUID LEVEL SENSOR USING ETCHED SILICA FIBER, J. Linesh, K. Sudeesh,
P. Radhakrishnan,and V. P. N. Nampoori, Microwave Opt. Technol. Lett., 52,
883,2010. |
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Thermal diffusivity of rhodamine 6G incorporated in silver nanofluid
measured using mode-matched thermal lens technique, Santhi Ani Joseph,
Misha Hari, S. Mathew, Gaurav Sharma, Soumya, V.M. Hadiya, P. Radhakrishnan,
V.P.N. Nampoori, Optic. Comms; 283(2010) 313?317. |
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Laser induced Bessel beams can realize fast all-optical switch in gold
nanosol prepared by pulsed laser ablation, Santhi Ani Joseph, Gaurav
Sharma, Misha Hari, S. Mathew, P. Radhakrishnan, V. P .N. Nampoori, JOSA B
(in press 2010) 313?317. |
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Photothermal characterization of nanogold under conditions of resonance
excitation and energy transfer, Santhi Ani Joseph, S. Mathew, Gaurav
Sharma, Misha Hari, P. Radhakrishnan, V.P.N. Nampoori, Plasmonics (2010)
DOI: 10.1007/s11468-009-9116-0 313?317. |
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Publications-2009 |
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Fast imaging of laser blow off plume: lateral confinement in ambient
environment, Sony George, Ajai Kumar, R.K.Singh, V.P.N.Nampoori, APPLIED
PHYSICS LETTERS 94, 141501 (2009). |
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Effect of ambient gas on the expansion dynamics of plasma plume formed by
laser blow off of thin film, Sony George, Ajai Kumar, R.K.Singh,
V.P.N.Nampoori, Applied Physics A, 1432-0630 (2009). |
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Thermal characterization of methylene blue intercalatedmontmorillonites by
photoacoustic technique, Lyjo K. Joseph, H. Suja, G. Sanjay, S. Sugunan,
V.P.N. Nampoori , P. Radhakrishnana,Applied Clay Science 42 (2009) 483?487.
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Thermal characterisation of dye-intercalated K-10 montmorillonite ceramics
using photoacoustic technique, L. K. Joseph ; G. Sanjay ; H. Suja ; S.
Sugunan ; V. P. N. Nampoori ; P. Radhakrishnan, Philosophical Magazine Vol.
89, No. 10, 1 April 2009, 895?905.
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Kinetics of bacterial colony growth by laser induced fluorescence, B.
Nithyaja, V. K. Jisha,R. Tintu, A.V. Saramma and V. P. N. Nampoori, Laser
Physics, 2009, Vol. 19, No. 3, pp.468-472. |
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Selective mode excitation in the dye ?doped DNA polyvinyl alcohol thin film,
Nithyaja Balan, Misha Hari, Vadakkedathu Parameswaran Narayana Namppori,
Appl. Opt. 48 3521-3525(2009). |
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Hopf bifurcation in parallel polarized Nd:YAG laser, M.R.
Parvathi, Bindu M. Krishna, S. Rajesh, M.P. John and V.M. Nandakumaran,
Chaos, Solitons & Fractals Vol.42, Issue 1, 2009, pp. 515-521
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Effect of a fluctuating parameter mismatch and the associated time-scales on
coupled Rossler oscillators,
Manu P. John , P. U. Jijo and V. M. Nandakumaran, Pramana, Vol.72, No.3,
2009, pp.495-503.
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Identification of spectral lines of elements using artificial neural
networks,
, M. Saritha, and V.P.N. Nampoori, Microchemical Journal, Vol.91, Issue 2,
2009, pp. 170-175.
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Publications-2008 |
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Visible luminescence mechanism in nano ZnO under weak confinement regime,
Litty Irimpan, V P N Nampoori and P Radhakrishnan, Journal of Applied Physics,
Volume 104, December 2008, Page 113112 |
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Enhanced luminescence and nonlinear optical properties of nanocomposites of
ZnO-Cu,
Litty Irimpan, V P N Nampoori and P Radhakrishnan, Journal of Materials
Research, Volume 23, Issue 11, Novemeber 2008, pp 2836-2845 |
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Nonlinear optical characteristics of nanocomposites of ZnO-TiO2-SiO2,
Litty Irimpan, Bindu Krishnan, V P N Nampoori and P Radhakrishnan, Optical
Materials, Volume 31, Issue 2, October-December 2008, Pages 361-365 |
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Kinetic studies of chemical reaction using laser induced
thermal lens technique,
Achamma
Kurian, C V Bindhu and V P N Nampoori,
Journal of Optics, 2008, Vol. 37, No. 2, Page 43-50 |
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Fluorescence
characterization and gain studies on a dye-doped graded index polymer
optical-fiber preform,
M Kailasnath, T S Sreejaya, Rajesh Kumar, C P G Vallabhan, V P N Nampoori and
P Radhakrishnan, Optics & Laser Technology, Volume 40, Issue 5, July 2008, Pages
687-691 |
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Excitatiopn wavelength
dependence of energy transfer in dye mixture doped polymer optical fibre
preforms,
M.Kailasnath, Nishant Kumar,
V.P.N.Nampoori,C.P.G. Vallabhan, P.RadhakrishnanJournal of photochemistry and
Photobiology A: Chemistry 199(2008) 236-241 |
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Synchronization and control of chaos in coupled chaoitic multimode Nd:YAG
lasers, M.R.
Parvathi , Bindu M. Krishna, S. Rajesh, M.P. John and V.M.
Nandakumaran, Physics Letters A Volume 373, Issue 1, 22 December 2008, Pages
96-101 |
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Thermal characterization of
methylene blue intercalated montmorillonites by photoacoustic technique,
Lyjo K Joseph, H Suja, G Sanjay, S Sugunan, V P N Nampoori and P Radhakrishnan,
doi:10.1016/j.clay.2008.06.006 |
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Comparative Performance of Two
Fiber Optic Ammonia Sensors Employing Different Sensing Materials, Jinesh
Mathew, V. V. Mahesh and P. Radhakrishnan, Sensors & Transducers Journal, Vol.
95, Issue 8, August 2008, pp. 65-71 |
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Linear and
nonlinear optical characteristics of ZnO-SiO2 nanocomposites,
Litty Irimpan,
Bindu Krishnan, V P N Nampoori and P Radhakrishnan,
Applied Optics, Volume 47, Issue 24, August 2008, pp 4345-4351 |
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Effect of
annealing on the spectral and nonlinear optical characteristics of thin films of
nano ZnO,
Litty Irimpan,
D
Ambika, V Kumar, V P N Nampoori and P Radhakrishnan,
Journal of
Applied Physics, Volume 104, Issue 3, August 2008, pp 033118 |
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Luminescence
tuning and enhanced nonlinear optical properties of nanocomposites of ZnO-TiO2,
Litty Irimpan,
Bindu Krishnan, V P N Nampoori and P Radhakrishnan,
Journal of
Colloid and interface Science, Volume 324, Issues 1-2, August 2008, pp 99-104 |
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Backscattering
of laser light from colloidal silica,
Litty Irimpan, V J Dann, Bindu Krishnan, A Deepthy, V P N Nampoori and P
Radhakrishnan,
Laser Physics,
Volume
18,
Issue
7, July 2008, pp
882-885 |
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Synthesis and
nonlinear optical studies of nano ZnO colloids,
Bindu Krishnan, Litty Irimpan, V. P. N. Nampoori and V. Kumar, Physica E, Volume
40, Issue 8, June 2008, pp 2787-2790 |
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Side illumination fluorescence
emission characteristics from a dye doped polymer optical fiber under two photon
excitation, M Sheeba, M Rajesh, S Mathew, VPN Nampoori, CPG Vallabhan and P
Radhakrishnan, Appl. Opt, 2008 – OSA |
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Photoluminescence studies on
rare earth titanates prepared by self propagating high temperature synthesis
method, Lyjo K Joseph, K R Dayas, Bindu Krishnan, Soniya Damodar, K
Krishnankutty, V P N Nampoori and P Radhakrishnan, Spectrochimica Acta Part A:
Molecular and Biomolecular Spectroscopy, DOI information:
10.1016/j.saa.2008.03.030. |
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Raman spectra of polymethyl
methacrylate optical fibers excited by a 532 nm diode pumped solid state laser,
K J Thomas, M Sheeba, VPN Nampoori, CPG Vallabhan and P Radhakrishnan, Journal
of Optics A: Pure and Applied Optics, Vol 10, 2008 pp 055303. |
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Fabrication and
characterization of dye mixture doped polymer optical fiber as a broad
wavelength optical amplifier, M. Sheeba, M. Rajesh, V. P. N. Nampoori, and
P. Radhakrishnan, Applied Optics, Vol. 47, Issue 11, 2008, pp. 1907-1912. |
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Nonlinear optical
characteristics of self-assembled films of ZnO, Litty Irimpan, A. Deepthy,
Bindu Krishnan, V.P.N. Nampoori and P. Radhakrishnan, Applied Physics B: Lasers
and Optics Volume 90, Numbers 3-4 / March, 2008 pp547-556 |
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Spectral and nonlinear optical
characteristics of nanocomposites of ZnO–CdS, Litty Irimpan, V.P.N. Nampoori
and P. Radhakrishnan, J. Appl. Phys. 103, 094914 (2008); DOI:10.1063/1.2919109. |
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Spectral and nonlinear optical
characteristics of nanocomposites of ZnO–Ag, Litty Irimpan, V.P.N. Nampoori
and P. Radhakrishnan, Chemical Physics Letters Vol 445, 10 april 2008 ,pp
265-269. |
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Effect of self assembly on the
nonlinear optical characteristics of ZnO thin films, Litty Irimpan, A.
Deepthy, Bindu Krishnan, L.M. Kukreja, V.P.N. Nampoori and P. Radhakrishnan ,
Optics Communications Vol 281 , 15 may 2008, pages 2938- 2943. |
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An Optoelectronic Sensor
Configuration for the Determination of Age Related Indices Using Blood Volume
Pulse, Jayasree V.K, Shaija P.J, Manu P. John, P. Radhakrishnan, Sensors &
Transducers, vol.87, Jan.2008, pp 39-45. |
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Size dependent enhancement of
nonlinear optical properties in nano colloids of ZnO, Litty Irimpan, Bindu
Krishnan, A. Deepthy, V.P.N Nampoori and P. Radhakrishnan, Journal of applied
physics, 103, 033105 (2008). |
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Publications-2007 |
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Study of solvent effect in
laser emission from Coumarin 540 dye solution, Ritty J. Nedumpara,
Thomas K. J., Jayasree V. K., C.P. Girijavallabhan, V.P.N. Nampoori, P.
Radhakrishnan, Applied Optics 2007 |
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Multimode laser emission
from dye doped polymer optical fiber, M. Sheeba, K.J. Thomas, M. Rajesh,
V.P.N. Nampoori, C.P.G. Vallabhan, P.Radhakrishnan, Applied Optics, Vol 46,
8089- 8094, 2007. |
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Thermal lens technique to
study the effect of pH on electronic energy transfer in organic dye mixtures,
Achamma Kurian, Sajan D. George, C.V. Bindhu, V.P.N. Nampoori and C.P.G.
Vallabhan, Spectrochimica Acta Part A: Molecular and Biomolecular
Spectroscopy, 67, Issues 3-4, July 2007, Pages 678-682. |
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Fabrication and
Characterization of Monolithically Fused Wavelength-Independent 1X4 Couplers,
Samuel Varghese, Muhammed Iqbal, Suresh Nair, V.P.N. Nampoori and C.P.G.
Vallabhan, Fiber and Integrated Optics 26, 245-254 (2007). |
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A Comparative Study of
Fiber Optic Humidity Sensors Based on Chitosan and Agarose, Jinesh
Mathew, K. J. Thomas, V. P. N. Nampoori and P. Radhakrishnan, Sensors &
Transducers Journal, Vol.84, Issue 10, October 2007, pp. 1633-1640. |
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A comparative study of
energy transfer in dye mixtures in monomer and polymer matrices under pulsed
laser excitation, M Kailasnath, P R John,
P Radhakrishnan V P N Nampoori and C P G Vallabhan,
Journal of Photochemistry and Photobiology A:Chemistry, (2007). |
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Photoacoustic studies on
thermal parameters of liquid crystal mixtures, Sajan D George, A K
George,
P Radhakrishnan, V P N Nampoori and C P G Vallabhan, Smart Mater Struct. 16,
1298-1301 (2007). |
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Photoacoustic Thermal
Characterisation of Porous Rare-Earth Phosphate Ceramics, Sajan D
George, Rajesh Komban, K G K Warrier,
P Radhakrishnan, V P N Nampoori and C P G Vallabhan, International Journal
of Thermophysics, Vol. 28, No. 1 (2007). |
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Size dependent
fluorescence spectroscopy of nanocolloids of ZnO, Litty Irimpan, A
Deepthy, Bindu Krishnan, V P N Nampoori and P Radhakrishnan, J.Appl. Phys.
102, 063524 (2007). |
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Excitation wavelength dependent fluorescence
behaviour of nano colloids of ZnO, Litty Irimpan, Bindu Krishnan, A
Deepthy, V P N Nampoori and P Radhakrishnan, J. Phys. D: Appl. Phys. 40(18)
5670-5674(2007). |
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Spectoscopic Characterisation of Laser
Induced Plasma from Titanium Dioxide. V J Dann , Manoj V Mathew, V P N
Nampoori , C P G Vallabhan, V M Nandakumaran, P Radhakrishnan, Plasma
Science and Technology, Vol 9, No 4, August 2007. |
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Fabrication
and characterization of dye doped optical fiber as a light amplifier,
Mandanparambil Rajesh, Mavila Sheeba, Karinjamanna Geetha, Chakkalakkal P.
G. Vallabhan, Padmanabhan Radhakrishnan, and Vadakkedathu P. N. Nampoori,
Applied Optics, Vol. 46, No.1, 1 January 2007. |
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Thermal characterization of
ceramic tapes using photo acoustic effect,
Annieta Philip K , Lyjo K. Joseph , Litty M. Irimpan,
Bindu Krishnan , P. Radhakrishnan , V. P. N. Nampoori
, Raghu Natarajan, physica status solidi (a), (2007). |
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Laser induced fluorescence based
optical fiber probe for analyzing bacteria,
P. M. Sandeep, S W B Rajeev, M Sheeba, S G Bhat and V P N Nampoori, Laser
Physics Letters, 1-5 (2007). |
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Light amplification in dye doped
polymer films, Ritty
J.Nedumpara, Geetha K, Dann V. J, V P N Nampoori, C.P.G.Vallabhan and
P Radhakrishnan, J. of Opt.A:Pure and Appl.Opt.9 (2007) 7-14 |
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Publications-2006 |
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Spectral
dependence of third order nonlinear optical susceptibility of zinc
phthalocyanine, A
Santhi, Vinu V Namboodiri, P Radhakrishnan and V P N Nampoori, Journal of
Applied Physics, 100, 053109 (2006). |
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Simultaneous determination of
nonlinear optical and thermo-optic parameters of liquid samples,
A Santhi, V N Vinu, P Radhakrishnan and V P N Nampoori, Applied Physics
Letters, 89, 1 (2006). |
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Laser emission from transversely
pumped dye-doped free standing polymer film,
K Geetha, M Rajesh, V P N Nampoori, C P G Vallabhan and P Radhakrishnan,
Journal of optics A: Pure and Applied optics, 8, (2006) 189-193. |
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Propagation characteristics and
wavelength tuning of amplified spontaneous emission from dye-doped polymer,
K Geetha, M Rajesh, V P N Nampoori, C P G Vallabhan and P Radhakrishnan,
Applied Optics, Vol.45, No.4, 1 Feb 2006. |
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Control of bistability in a
directly modulated semiconductor laser using delayed optoelectronic feedback,
S Rajesh, V M Nandakumaran, Elsevier Physica D 213 (2006) 113-120. |
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A fiber optic smart sensor for
studying the setting characteristics of various grades of cement,
M Rajesh, K Geetha, M Sheeba, P Radhakrishnan , C P G Vallabhan and V P N
Nampoori, Optics and Lasers in Engineering, Volume 44, Issue 5, May 2006,
Pages 486-493. |
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Characterization of
Rhodamine 6G doped polymer optical fiber by side illumination fluorescence,
M Rajesh, K Geetha, M Sheeba, , C P G Vallabhan, P Radhakrishnan and V P N
Nampoori, Optical Engineering, 45(7) 075003, July 2006.
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Design and fabrication of
dye-doped polymer optical fiber for optical amplification,
M Rajesh, M Sheeba, K Geetha, C P G Vallabhan, P Radhakrishnan and V P
N Nampoori, SPIE Proceedings: Symposium on Optics & Photonics, August 2006,
San Diego, California USA.
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Backscattering from nano-sized ZnO suspensions ,
Bindu Krishnan, A. Deepthy
Litty Irimpan, Dann.V.J, V.P.N Nampoori, Physica E 35 (2006) 23-26.
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Publications-2005 |
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Dual
beam thermal lens and z scan studies of the thermo optical Properties of some
non linear materials,
A. Santhi, Vinu V N, M R P
Kurup, J Kesavayya, P Radhakrishnan and V P N Nampoori, Proceedings of
SPIE, Vol. 5710 , (2005), 91-98 |
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Line
narrowing effects and enhanced back scattering from ZnO colloids, Bindu
Krishnan and V P N Nampoori, J. Material Science, (in press). |
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Optothermal depth profiling by
neural network infrared radiometry Signal recognition,
Jyotsna Ravi, Yuekai Lu, and
Stéphane Longuemart, Stefano
Paoloni, Helge
Pfeiffer, Jan Tho and
Christ Glorieuxa, Journal of Applied Physics
97,
014701 (2005). |
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Photoacoustic study on the
photostability of polymethyl methacrylate films doped with Rodhamine 6G –
Rhodamine B dye mixture system,
Annieta Philip, Lyjo K Joseph, Litty Mathew Irimpan, P
Radhakrishnan and V P N Nampoori ,Journal of physics: D Applied Physics,
38, (2005), 2904. |
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Spectroscopic
characterization of laser induced tin plasma,
S S Harilal, Beau O’ shey,
Mark. S. Tillack and Manoj V Mathew, Journal of applied physics, 98,
013306, (2005). |
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Study on the determination of
molecular distance in organic dye mixtures using dual beam thermal lens,
Achamma Kurian, Sajan D
George, V P N Nampoori, C P G Vallabhan,
Spectrochimica Acta part A,
61, (2005), 2799. |
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Screen printed nanosized
ZnO thick film, Bindu Krishnan and V.P.N Nampoori, Bulletin of
Material Science, (in press). |
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Publications-2004 |
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Complexity Quantification of Dense Array EEG using Sample Entropy Analysis,
Pravitha Ramanand V P N Nampoori and R Sreenivasan, Journal of Integrative
Neuroscience, 3(3), (2004) 343-358. |
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Effect
of silver nano particles on the fluorescence quantum yield of Rhodamine 6G
determined using dual beam thermal lens method,
A Santhi, M Umadevi, V
Ramakrishnan, P Radhakrishnan and V P N Nampoori, Spectrochimica Acta Part A:
Molecular and Bimolecular Spectroscopy, 60 (5), (2004), 1077-1083. |
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Loss
characterization in Rhodamine 6G doped polymer film
waveguide by side
illumination fluorescence,
K Geetha, M Rajesh, V P N
Nampoori, C P G Vallabhan and P Radhakrishnan, J. Opt. A: Pure Appl. Opt. 6,
(2004),379–383 |
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Photoacoustic Investigation on the photostability of Coumarin 540-doped PMMA,
Ritty J
Nedumpara, Binoy Paul, Santhi A, P Radhakrishnan, V P N Nampoori, Spectrochimica
Acta Part A-60, (2004) ,435-439. |
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Nanosecond optical limiting response of sandwich-type neodymium dyphthalocyanine
in a co-polymer host,
B Aneeshkumar, Pramod Gopinath, Jayan Thomas, C P G Vallabhan, V P N Nampoori
and P Radhakrishnan, Synthetic Metals, 143, (2004), 197. |
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Photoacoustic investigations on intrinsic and extrinsic InP,
Sajan D George, B Aneeshkumar, P Radhakrishnan, V P N Nampoori and C P G
Vallabhan, Optical Engineering, 43 (12), (2004), 3114. |
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Photoacoustic
investigations on intrinsic and extrinsic Si,
Sajan D George, B Aneeshkumar, P Radhakrishnan, V P N Nampoori and C P G
Vallabhan, Optical Engineering (2004), ( in press). |
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Photoacoustic spectrum of samarium phthalocyanine powder,
Nibu A
George, R
Jyotsna, S Thomas Lee, B Aneeshkumar, J Thomas, V P N Nampoori and P
Radhakrishnan, Optical
Materials (in press). |
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Thermal lens technique to evaluate the fluorescence quantum yield of Schiff
base, A Santhi, U
L Kala, R J Nedumpara, A Kurian, M R P Kurup, P Radhakrishnan and V P N
Nampoori, Applied Physics B, (2004) 1-5. |
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Publications-2003
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Photothermal deflection measurement on heat transport in GaAs epitaxial
layers.
Sajan D
George, P Radhakrishnan, V P N Nampoori and C P G Vallabhan , Physical
Review B (2003), 68 (16), 165319
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Photothermal deflection studies on heat transport in intrinsic and
extrinisic InP.
Sajan D
George, P Radhakrishnan, V P N Nampoori and C P G Vallabhan Applied Physics
B: Lasers and Optics (2003), 77, 633-637
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Effect of Te doping on the thermal diffusivity of Bi2Se3 crystals – A study
using open cell photoacoustic technique.
Sajan D
George, Saji Augustine, Elizabeth Mathai, P Radhakrishnan, V P N Nampoori
and C P G Vallabhan, Physica Status Solidi (a), (2003), 196(2), 384-389.
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A
photoacoustic study of the effect of doping concentration in the transport
properties of GaAs epitaxial layers.
Sajan D
George, Dilna S, Prasanth R, P Radhakrishnan, C P G Vallabhan and V P N
Nampoori, Optical Engineering, (2003) 42 (5), 1476-1480
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Thermal characterisation of intrinsic and extrinsic InP.
Sajan D George, P Radhakrishnan, V P N Nampoori and C P G Vallabhan,
Journal of Physics D:Applied Physics, (2003), 36 (8), 990-993.
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Photoacoustic measurement of transport properties in doped GaAs epitaxial
layers.
Sajan D George, Dilna S, P Radhakrishnan, C P G Vallabhan and V P N
Nampoori, Physica Status Solidi (A), (2003), 195 No-2, 416-421
Abstract
Full text
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Trace
Detection of Nitrites in water using Long Periodic Grating in Multimode
Optical Fibers. P Suresh Kumar,
R Dinesh Kumar, Thomas Lee S, V P N Nampoori and P Radhakrishnan, Optics
Communications ( In Press)
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Long
Period Gratings in Multimode Fibers: Application in Chemical Sensing.
S Thomas Lee, P Suresh Kumar, R Dinesh Kumar, V P N Nampoori, C P G
Vallabhan and P Radhakrishnan, Optics Communications
( In Press)
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Evanescent wave fibre optic sensors for trace analysis of Fe3+ in water.
S. Thomas Lee, P. Suresh Kumar, K. P. Unnikrishnan, V. P. N. Nampoori, C. P.
G. Vallabhan, S. Sugunan and P. Radhakrishnan, Measurement Science and
Technology (2003), 14, 858-861
Abstract
Full text
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Effect of silver nano particles on the fluorescence quantum yield of
Rhodamine 6G determined using Dual beam thermal lens method.
Santhi A, M. Umadevi, V. Ramakrishnan, P. Radhakrishnan and V. P. N.
Nampoori,
Spectrochimica Acta part B
( In Press)
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Optical-limiting response of rare-earth metallo-phthalocyanine doped
copolymer matrix.
B. Aneeshkumar, Pramod Gopinath, Jayan Thomas, C. P. G. Vallabhan, V. P. N.
Nampoori, and P. Radhakrishnan, Journal of Optical Society of America B
(2003), 20, 1486-1490
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Thermal lens spectrum of organic dyes using optical parametric oscillator
Achamma kurian, K. P. Unnikrishnan, D. Sajan George, Pramod Gopinath, V.P.N
Nampoori and C. P. G. Vallabhan, Spectrochimica Acta part A (2003), 59,
487-491
Abstract
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Publications-2002
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Studies on two photon absorption of aniline using thermal lens effect.
Achamma Kurian, K P Unnikrishnan, Thomas Lee Sajan D George,V P N Nampoori
and C P G Vallabhan, Journal of Nonlinear Optical Physics & Materials
( In Press)
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Studies on fluorescence efficiency and photodegeneration of rhodamine 6G
doped PMMA using thermal lens technique.
Achamma Kurian, Nibu A George, Binoy Paul, V P N Nampoori and C P G
Vallabhan, Laser Chemistry (2002), 20 (2-4), 99-110
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Realization of optical logic gates using thermal lens technique.
Achamma Kurian, Nibu A George, S. Thomas Lee, K P Unnikrishnan, V P N
Nampoori and C P G Vallabhan, Laser Chemistry (2002), 20 (2-4), 81-87
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Design and development of an LED based fiber optic evanescent wave sensor
for simultaneous detection of chromium and nitrite traces in water. P.
Suresh Kumar, S. Thomas Lee, C.P.G.Vallabhan, V.P.N. Nampoori and P.
Radhakrishnan, Optics Communications (2002), 214 (1-6), 25-30
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Compact polrization-independent Match-Zender space switch combining carrier
depletion and the quantum confined stark effect. R.Prasanth,
J.E.M.Haverkort, J.H.Wolter, IEEE Journel of Quantum Electronics
( In Press)
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Optical properties of porphyrins in borate glassy matrix.
Kumar, G. A.; Thomas, Vinoy; Jose, Gin; Unnikrishnan, N. V.; Nampoori, V.
P. N. , Materials Chemistry and Physics (2002), 73(2-3), 206-211.
Abstract
Full text
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Effect of pH on quantum yield of fluorescein using thermal lens technique.
Achamma
Kurian, Nibu A George, Sajan D George, K P Unnikrishnan, Binoy Paul, Pramod
Gopinath, V P N Nampoori and C P G Vallabhan, Journal of Optics, (2002),
31(1), 29-36.
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Optical emission
diagnostics of laser produced carbon plasma.
Harilal, S. S., Advances in Laser and Optics Research, (2002), 1, 187-230,
(Chapter in the book by
Nova Publishers)
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Photoacoustic Investigation of doped InP using open cell configuration.
Sajan.D. George. C.P.G.Vallabhan, M.Heck, P.Radhakrishnan and
V.P.N.Nampoori, Nondestructive Evaluation and Testing,(2002), 18, 75-82.
Abstract
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Photothermal deflection studies on GaAs epitaxial layers.
George N A, Vallabhan C P G, Nampoori V P N and Radhakrishnan P, Applied
Optics, ( 2002), 41(24), 5179-5184.
Abstract
Full text
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Degenerate four wave mixing in sume metal phthalocyanines and
naphthalocyanines. K. P. Unnikrishnan, Jayan Thomas, V. P. N. Nampoori
and C. P. G. Vallabhan, Chem. Phys., 279, 2002, 209-213.
Abstract
Full text
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A
Fiber optic evanescent wave sensor used for the detection of trace nitrites
in water.
P Sureshkumar, C P G Vallabhan, V P N Nampoori, V N Sivasankara Pillai
and P Radhakrishnan, Journal of Optics A.
Abstract
Full text
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Microbent Optical Fibers as Evanescent Wave Sensors
.
S Thomas Lee, K. Geetha, V P N Nampoori, C P G Vallabhan and P
Radhakrishnan Optical Engg., ( In Press)
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A
microbent fiber optic pH sensor.
S. Thomas Lee, B. Aneeshkumar, P. Radhakrishnan, C. P. G. Vallabhan and
V. P. N. Nampoori, Optics Communications.
Abstract
Full text
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Chaotic encryption using long wavelength directly modulated semiconductor
lasers.
V. Bindu, V M Nandakumaran., J. Optics A- Pure & Appl. Optics.
Abstract
Full text
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NIR
to UV absorption spectra and the optical constants of phthalocyanines in
glassy medium.
G. A. Kumar, Gin Jose, Vinoy Thomas, N. V. Unnikrishnan and V. P. N.
Nampoori, Spectrochimica Acta Part A: Molecular and Biomolecular
Spectroscopy, ( In Press)
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Third
order nonlinear optical studies in europium naphthalocyanine using
degenerate four wave mixing and Z-scan.
K. P. Unnikrishnan, Jayan Thomas,
V. P. N. Nampoori and C. P. G. Vallabhan, Optics Communications, 204,
(2002), 385-390.
Abstract
Full text
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Photoacoustic studies on n-type InP. Nibu A. George, C. P. G. Vallabhan,
V. P. N. Nampoori, and P. Radhakrishnan, Optical Engineering ,(2002) ,41(1),
251-254
Abstract
Full text
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Optical properties of porphyrins in borate glassy matrix.
Kumar, G. A.; Thomas, Vinoy; Jose,
Gin; Unnikrishnan, N. V.; Nampoori, V. P. N., Materials Chemistry and
Physics (2002), 73(2-3), 206-211. Abstract
Full text
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Dynamical aspects of coupled Rossler systems: effects of noise.
Pravitha, R.; Indic, P.; Nampoori,
V. P. N.
Physics Letters
A (2002), 294(1), 37-46.
Abstract
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Publications-2001
Laser induced photoacoustic technique for the detection of phase transitions
in liquid crystals.
George, Nibu A.; Vallabhan, C. P. G.; Nampoori, V. P. N.; George, A. K.;
Radhakrishnan, P. ,Nondestructive Testing and Evaluation (2001), 17(6),
315-324.
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Study
of energy transfer in organic dye pairs using thermal lens technique.
Achamma Kurian, K P Unnikrishnan,
Pramod Gopinath, V P N Nampoori and C P G Vallabhan, Journal of Nonlinear
Optical Physics & Materials, Vol. 10, No. 4(2001) 415-421
Abstract
Full text
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Effect of time scales on the unfolding of neural attractors.
Pravitha, R; Indic, P; Nampoori, V P; Pratap, R, The International Journal
of Neuroscience, Volume 111, Issue 3-4, (2001),175-186 . Abstract
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Chemical sensing with microbent optical fiber.
Thomas, Lee S.; George, Nibu Sureshkumar, P.; Radhakrishnan, P.;
Vallabhan, C. P. G.; Nampoori, V. P. N.
Opt. Lett. (2001),
26(20), 1541-1543.
Abstract
Full text
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A
sensitive fibre optic pH sensor using multiple sol-gel coatings.
Lee, S. Thomas; Gin, Jose; Nampoori, V. P. N.; Vallabhan, C. P. G.;
Unnikrishnan, N. V.; Radhakrishnan, P. ,
J. Opt. A: Pure Appl. Opt. (2001),
3(5), 355-359.
Abstract
Full text
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Use
of an open photoacoustic cell for the thermal characterisation of liquid
crystals.
George, N. A.; Vallabhan, C. P. G.; Nampoori, V. P. N.; George, A.
K.; Radhakrishnan, P. , Appl.
Phys. B: Lasers Opt. (2001),
73(2), 145-149
Abstract
Full text
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Open-cell photoacoustic investigation of the thermal effusivity of liquid
crystals.
George, Nibu A.; Vallabhan, C. P. G.; Nampoori, V. P. N.; George, A. K.;
Radhakrishnan, P. , Opt. Eng.
(2001),
40(7), 1343-1347.
Abstract
Full text
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Low-crosstalk penalty MZI space switch with a 0.64-mm phase shifter using
quantum-well electrorefraction.
Dorren, B.H.P.; Haverkort, J.E.M.; Prasanth, R.; Groen, F.H.; Wolter,
J.H.
, IEEE Photonics Technology Letters (2001)
Volume: 13, Issue: 1 , 37 -39.
Abstract
Full text
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Nonlinear absorption and optical limiting in solutions of some rare earth
substituted phthalocyanines.
Unnikrishnan, K. P.; Thomas, Jayan; Paul, Binoy; Kurian, Achamma;
Gopinath, Pramod; Nampoori, V. P. N.; Vallabhan, C. P. G.,
J. Nonlinear Opt. Phys. Mater.
(2001),
10(1), 113-121.
Abstract
Full text
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Optical absorption and emission spectral studies of phthalocyanine molecules
in DMF.
Kumar, G. A.; Thomas, J.;
Unnikrishnan, N. V.; Nampoori, V. P. N.; Vallabhan, C. P. G.,
J. Porphyrins Phthalocyanines
(2001),
5(5), 56-459.
Abstract
Full text
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Optical properties of phthalocyanine molecules in cyano acrylate polymer
matrix.
Kumar, G. A.; Thomas, J.; Unnikrishnan, N. V.; Nampoori, V. P. N.;
Vallabhan, C. P. G. , Mater. Res.
Bull. (2001),
36(1-2), 1-8.
Abstract
Full text
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Effect of the excitation source on the quantum-yield measurements of
Rhodamine B laser dye studied using thermal-lens technique.
Bindhu, C. V.; Harilal, S. S., Anal. Sci.
(2001),
17(1),141-144
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Photoacoustic evaluation of the thermal effusivity in the isotropic phase of
certain comb-shaped polymers.
George, Nibu A.;
Vallabhan, C. P. G.;Nampoori, V. P. N.; George, A. K.; Radhakrishnan, P.,
J. Phys.: Condens. Matter (2001),
13(3), 365-371.
Abstract
Full text
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Expansion dynamics of laser ablated carbon plasma plume in helium ambient.
Harilal, S. S. , Appl. Surf. Sci.
(2001), 172(1-2),
103-109.
Abstract
Full text
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Effect of excitation source on the quantum yield measurements of rhodamine B
using thermal lens technique.
Bindhu CV and Harilal SS , Analytical Sciences
(2001), 17, 141-44.
Abstract
Full text
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Publications-2000
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Use
of photoacoustic effect for the detection of phase transitions in liquid
crystal mixtures.
Nibu A.; Vallabhan, C. P. G.; Nampoori, V. P. N.; George, A. K.;
Radhakrishnan, P., J. Phys. D: Appl.
Phys.(2000), 33(24),3228 Astract
Full text
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Numerical studies on bi-directionally coupled directly modulated
semiconductor lasers.
Bindu, V.; Nandakumaran, V. M.
, Phys. Lett. A (2000), 277(6),
345-351.
Abstract
Full text
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Emission spectral studies of phthalocyanines in borate glass matrix.
Kumar, G. A.; Nampoori, V. P. N.; Vallabhan, C. P. G.; Jose, G.;
Unnikrishnan, N. V.
, J. Mater. Sci. Lett.
(2000),
19(18), 1669-1672. Abstract
Full text
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Spectral studies of naphthalocyanine (Nc) and rare earth phthalocyanine
(RePc) molecules in an inorganic glassy borate matrix.
Kumar,
G. A.; Thomas, J.; George, N.; Nampoori, V. P. N.; Radhakrishnan, P.;
Vallabhan, C. P. G.; Unnikrishnan, V. ,
Phys. Chem. Glasses (2000),
41(4), 199-203.
Abstract
Full text
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Optical studies of phthalocyanine molecules in PVA film.
Thomas,
J.; Kumar, G. A.; Unnikrishnan, N. V.; Nampoori, V. P. N.; Vallabhan, C. P.
G.
, Mater. Lett. (2000),
44(5), 275-278.
Abstract
Full text
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Physical and optical properties of phthalocyanine doped inorganic glasses.
Kumar, G. A.; Thomas, J.; George, N.; Unnikrishnan, N. V.; Radhakrishnan,
P.; Nampoori, V. P. N.; Vallabhan, C. P. G.
, J. Mater. Sci.(2000) 35(10),2539.
Abstract
Full text
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Optical absorption studies of free (H2Pc) and rare earth (RePc)
phthalocyanine doped borate glasses.
Kumar, G. A.; Thomas, J.; George, N.; Kumar, B. A.; Radhakrishnan,
P.; Nampoori, V. P. N.; Vallabhan, C. P. G.; Unnikrishnan, N. V.,
Phys. Chem. Glasses (2000),
41(2), 89-93. Abstract
Full text
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Dynamics of two coupled chaotic multimode Nd:YAG lasers with intracavity
frequency doubling crystal.
Kuruvilla, Thomas; Nandakumaran, V. M. , Pramana
(2000), 54(3),
393-402. Abstract
Full text
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Experimental investigation of optical limiting and thermal lensing in
toluene solutions of C70.
Bindhu, C. V.; Harilal, S. S.; Nampoori, V. P. N.; Vallabhan, C.
P. G. , Appl. Phys. B: Lasers Opt.
(2000),
70(3), 429-434.
Abstract
Full text
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Photoacoustic investigation of the effect of excess lead oxide on thermal
diffusivity of PLZT ceramic.
George, N. A.; Paul, T.; Radhakrishnan, P.; Nampoori, V. P. N.;
Vallabhan, C. P. G.; Sebastian, M. T. ,
J. Mater. Sci. Lett. (2000),
19(6), 499-501.
Abstract
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Fading of thermoluminescence from CaS and CaS:Ce phosphors. Joseph,
James; Ananthakrishnan, T. R.; Nampoori, V. P. N.; Warier, M. K. Rudra.
Indian J. Phys., A (2000), 74A(1), 21-24.
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Publications-1999
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Thermal diffusivity of some polymer supported halogeno benzimidazole
complexes of cobalt(II) and copper(II) - a photoacoustic study.
Raman,
S. Sankara; Nampoori, V. P. N.; Vallabhan, C. P. G.; Saravanan, N.; Yusuff,
K. K. Mohammed. , J. Mater. Sci.
Lett.
(1999), 18(23),
1887-1889.
Abstract
Full text
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Solvent effect on absolute fluorescence quantum yield of rhodamine 6G
determined using transient thermal lens technique.
Bindhu,
C. V.; Harilal, S. S.; Nampoori, V. P. N.; Vallabhan, C. P. G.
, Mod. Phys. Lett. B (1999),
13(16), 563-576.
Abstract
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Evaluation of electrical conductivity and thermal diffusivity of vanadyl
naphthalocyanine.
Thomas, J.; Pillai, V. N. S.; Nampoori, V. P. N.; Vallabhan, C. P.
G., J. Mater. Sci. Lett. (1999),
18(12), 963-964.
Abstract
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Photoacoustic study on photobleaching of Rhodamine 6G doped in poly(methyl
methacrylate).
George, Nibu A.; Aneeshkumar, B.; Radhakrishnan, P.; Vallabhan, C.
P. G. , J. Phys. D: Appl. Phys. (1999), 32(14),1745.
Abstract
Full text
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Optical limiting and thermal lensing studies in C60.
Harilal,
S. S.; Bindhu, C. V.; Nampoori, V. P. N.; Vallabhan, C. P. G., J. Appl.
Phys.
(1999), 86(3),
1388-1392.
Abstract
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Monitoring the rate of pulsed laser deposition of silver thin films using a
fiber optic sensor.
John, M. Shelly; Radhakrishnan, P.; Nampoori, V. P. N.; Vallabhan,
C. P. G. Proc. SPIE-Int. Soc. Opt.
Eng. (1999),
3666(Photonics India '98),
574-577
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Investigation of nonlinear absorption and aggregation in aqueous solutions
of rhodamine B using thermal lens technique.
Bindhu,
C. V.; Harilal, S. S.; Nampoori, V. P. N.; Vallabhan, C. P. G.,
Pramana (1999),
52(4), 435-442.
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Suppression of chaos through reverse period doubling in coupled directly
modulated semiconductor lasers.
Kuruvilla,
Thomas; Nandakumaran, V. M. Phys.
Lett. A (1999),
254(1,2), 59-64.
Abstract
Full text
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Studies of nonlinear absorption and aggregation in aqueous solutions of
rhodamine 6G using a transient thermal lens technique.
Bindhu,
C. V.; Harilal, S. S.; Nampoori, V. P. N.; Vallabhan, C. P. G.
, J. Phys. D: Appl. Phys.
(1999),
32(4), 407-411.
Abstract
Full text
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A
fiber optic evanescent wave sensor for monitoring the rate of pulsed laser
deposition of metal thin films.
John,
M. Shelly; Radhakrishnan, P.; Nampoori, V. P. N.; Vallabhan, C. P. G.
,Meas. Sci. Technol. (1999),
10(2), n17-n20.
Abstract
Full text
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Photoacoustic study of the effect of hydroxyl ion on thermal diffusivity of
g alumina.
Sankara
Raman, S.; Nampoori, V. P. N.; Vallabhan, C. P. G.; Ambadas, G.; Sugunan, S. , J. Appl. Phys. (1999), 85(3), 1987-1988. Abstract
Full text
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Significance of time scales in nonlinear dynamical analysis of
electroencephalogram signals. Indic P; Pratap R; Nampoori V P;
Pradhan N International Journal Of Neuroscience (1999 Aug), 99(1-4),
181-94.
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Publications-1998
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Two
and three photon absorption in rhodamine 6G methanol solutions using pulsed
thermal lens technique.
Bindhu,
C. V.; Harilal, S. S.; Kurian, Achamma; Nampoori, V. P. N.; Vallabhan, C. P.
G. , J. Nonlinear Opt. Phys.
Mater. (1998),
7(4), 531-538.
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Thermal diffusivity measurements in organic liquids using transient thermal
lens calorimetry.
Bindhu, C. V.; Harilal, S. S.; Nampoori, V. P. N.; Vallabhan, C.
P. G., Opt. Eng. (Bellingham,
Wash.) (1998),
37(10), 2791-2794.
Abstract
Full text
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A
molecular electrostatic potential mapping study of some fluoroquinolone
anti-bacterial agents.
Chidangil, Santhosh; Shukla, Manoj K.; Mishra, Phool C.
J. Mol. Model. (1998),
4(8), 250-258.
Abstract
Full text
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An
optical fiber based evanescent wave sensor to monitor the deposition rate of
thin films.
Jose, Deepa; John, M. Shelly; Radhakrishnan, P.; Nampoori, V. P.
N.; Vallabhan, C. P. G. , Thin Solid
Films (1998),
325(1,2), 264-267. Abstract
Full text
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Twin
peak distribution of electron emission profile and impact ionization of
ambient molecules during laser ablation of silver target.
Issac,
Riju C.; Gopinath, Pramod; Varier, Geetha K.; Nampoori, V. P. N.; Vallabhan,
C. P. G. , Appl. Phys. Lett.
(1998), 73(2),
163-165. Abstract
Full text
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Use of mirage effect for the detection of phase transitions in liquid crystals.
Rajasree, K.; Vidyalal, V.; Radhakrishnan, P.; Nampoori, V. P. N.;
Vallabhan, C. P. G.; George, A. K. ,
Cochin,
India. Mater.
Lett. (1998), 36(1-4),
76-80.
Abstract
Full text
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Dynamics of laser produced silver plasma under film deposition conditions
studied using optical emission spectroscopy.
Issac,
Riju C.; Vasudevan Pillai, K.; Harilal, S. S.; Varier, Geetha K.; Bindhu, C.
V.; Gopinath, Pramod; Radhakrishnan, P.; Nampoori, V. P. N.; Vallabhan, C.
P. G.
, Appl. Surf. Sci. (1998),
125(2), 227-235.
Abstract
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Influence of ambient gas on the temperature and density of laser produced
carbon plasma.
Harilal, S. S.; Bindhu, C. V.; Nampoori, V. P. N.; Vallabhan, C.
P. G., Appl. Phys. Lett.
(1998),
72(2), 167-169.
Abstract
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Prompt electron emission and collisional ionization of ambient gas
during pulsed laser ablation of silver. Issac, R. C.; Varier, G.
K.; Gopinath, P.; Harilal, S. S.; Nampoori, V. P. N.; Vallabhan, C. P.
G. Appl. Phys. A: Mater. Sci. Process. (1998), A67(5), 557-561.
Abstract
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Collective behavior of laser-produced plasma from a multicomponent
YBa2Cu3O7 target in air. Issac, R. C.; Varier, G. K.; Harilal,
S. S.; Nampoori, V. P. N.; Vallabhan, C. P. G. Appl. Phys. B: Lasers
Opt. (1998), B67(5), 647-651.
Abstract
Full text
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Time evolution of the electron density and temperature in laser-produced
plasmas from YBa2Cu3O7. Harilal, S. S.; Bindhu, C. V.; Nampoori,
V. P. N.; Vallabhan, C. P. G. Appl. Phys. B: Lasers Opt. (1998), B66(5),
633-638.
Abstract
Full text
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Temporal and spatial behavior of electron density and temperature in a
laser-produced plasma from YBa2Cu3O7. Harilal, S. S.; Bindhu, C.
V.; Nampoori, V. P. N.; Vallabhan, C. P. G. Appl. Spectrosc. (1998),
52(3), 449-455.
Abstract
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Publications-1997
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Anomalous profile of a self-reversed resonance line from Ba+ in a laser
produced plasma from YBa2Cu3O7.
Issac, Riju C.; Harilal, S. S.; Bindhu, C. V.; Varier, Geetha K.;
Nampoori, V. P. N.; Vallabhan, C. P. G.
, Spectrochim. Acta, Part B
(1997), 52B(12), 1791-1799.
Abstract
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Fine
structure in the time of flight distribution of C2 in laser produced plasma
from graphite.
Harilal, S. S.; Issac, Riju C.; Bindhu, C. V.; Nampoori, V. P. N.;
Vallabhan, C. P. G. , Pramana
(1997),
49(3), 317-322.
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Spatial analysis of C2 band emission from laser produced plasma.
Harilal, S. S.; Issac, Riju C.; Bindhu, C. V.; Nampoori, V. P. N.;
Vallabhan, C. P. G. , Plasma Sources
Sci. Technol. (1997),
6(3), 317-322.
Abstract
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Time
resolved study of CN band emission from plasma generated by laser
irradiation of graphite.
Harilal, S. S.; Issac, Riju C.; Bindhu, C. V.; Gopinath, Pramod;
Nampoori, V. P. N.; Vallabhan, C. P. G.
, Spectrochim. Acta, Part A
(1997),
53A(10), 1527-1536. Abstract
Full text
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Electron density and temperature measurements in a laser produced carbon
plasma.
Harilal, S. S.;
Bindhu, C. V.; Issac, Riju C.; Nampoori, V. P. N.; Vallabhan, C. P. G.
J. Appl. Phys. (1997),
82(5), 2140-2146.
Abstract
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Optical emission studies of C2 species in laser-produced plasma from carbon.
Harilal, S. S.; Issac, Riju C.; Bindhu, C. V.; Nampoori, V. P. N.;
Vallabhan, C. P. G. J. Phys. D:
Appl. Phys. (1997),
30(12), 1703-1709.
Abstract
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Emission characteristics and dynamics of C2 from laser-produced graphite
plasma.
Harilal, S. S.; Issac, Riju C.; Bindhu, C. V.; Nampoori, V. P. N.;
Vallabhan, C. P. G. , J. Appl. Phys. (1997), 81(8, Pt. 1),
3637-3643.
Abstract
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Photoacoustic signal saturation and optical limiting in C70-toluene
solution.
Issac, Riju C.; Harilal, S. S.; Varier, Geetha K.; Bindhu, C. V.;
Nampoori, V. P. N.; Vallabhan, C. P. G.,
Opt. Eng. (Bellingham, Wash.)
(1997),
36(2), 332-336.
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Induction of mitotic chromosomal aberrations by lasers in comparison to
gamma radiations. Pillai, P. R. Unnikrishna; Nambisan, Padma;
Nampoori, V. P. N.; Vallabhan, C. P. G.. Yichuan (1997), 19(5), 5-9.
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Possibility of waveguide formation on organic nonlinear crystal methyl
para-hydroxy benzoate using high energy ion irradiation. Sreeramana
Aithal, P.; Nagaraja, H. S.; Mohan Rao, P.; Nampoori, V. P. N.; Vallabhan,
C. P. G.; Avasthi, D. K. Nucl. Instrum. Methods Phys. Res., Sect. B (1997),
129(2), 217-220.
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Investigations on nanosecond laser produced plasma in air from the
multi-component material YBa2Cu3O7. Varier, Geetha K.; Isaac, Riju
C.; Harilal, S. S.; Bindhu, C. V.; Nampoori, V. P. N.; Vallabhan, C. P. G.
Spectrochim. Acta, Part B (1997), 52B(5), 657-666.
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Time
resolved analysis of C2 emission from laser induced graphite plasma in
helium atmosphere. Harilal, S. S.; Issac, Riju C.; Bindhu, C. V.;
Nampoori, V. P. N.; Vallabhan, C. P. G.. Jpn. J. Appl. Phys., Part 1 (1997),
36(1A), 134-138.
Abstract
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Publications-1996
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A
fiber optic sensor to measure surface tension.
Deepthy,
A.; Radhakrishnan, P.; Nampoori, V. P. N.; Vallabhan, C. P. G.
, J. Phys., B (1996),
70B(6), 527-530
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Photoacoustic studies on multilayer dielectric coatings.
Philip, Annieta; Radhakrishnan, P.; Nampoori, V. P.; Vallabhan, C.
P. G.,
J. Phys. D: Appl. Phys.
(1996), 29(5),
1387-1388.
Abstract
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Spatial and time resolved analysis of CN bands in the laser induced plasma
from graphite.
Harilal, S. S.; Issac, Riju C.; Bindhu, C. V.; Varier, Geetha K.;
Nampoori, V. P. N.; Vallabhan, C. P. G.,
Pramana
(1996), 46(2),
145-151
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Measurement of thermal diffusivity of some halogeno benzimidazole complexes
of cobalt(II), copper(II) and copper(I) using laser induced photoacoustic
effect.
Raman, S. Sankara; Nampoori, V. P. N.; Vallabhan, C. P. G.; Saravanan,
N.; Yusuff, K. K. Mohammed. J.
Mater. Sci. Lett. (1996),
15(3),230
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Photoemission optogalvanic studies with copper as target electrode. K.C.
Ajithprasad, VPN Nampoori and CPG Vallabhan, App. Surf. Sci.,(1996),103 (4),
465.
Abstract
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Pulsed photoacoustic determination of absolute fluorescent quantum yield of
the laser dye rhodamine B.
Bindhu, C. V.; Harilal, S. S.; Issac, Riju C.; Nampoori, V. P. N.;
Vallabhan, C. P. G. Mod. Phys. Lett. B (1996), 10(22), 1103-1110.
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Characterization of potassium doped GdBa2Cu3O7-d using Raman spectroscopy
and x-ray diffraction. [Erratum to document cited in CA124:329709].
Thomas, Preethi Cicily; Manoj, Jumar K.; Nayar, V. Unnikrishnan; Vidyalal,
V.; Vallabhan, C. P. G. Mod. Phys. Lett. B (1996), 10(23), 1159.
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Study
of laser ablation in liquids using pulsed photoacoustic technique.
Harilal, S. S.; Issac, Riju C.; Bindhu, C. V.; Nampoori, V. P. N.;
Vallabhan, C. P. G. Mod. Phys. Lett. B (1996), 10(21), 1053-1057.
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Temporal and spatial evolution of C2 in laser-induced plasma from graphite
target. Harilal, S. S.; Issac, Riju C.; Bindhu, C. V.; Nampoori, V.
P. N.; Vallabhan, C. P. G. J. Appl. Phys. (1996), 80(6), 3561-3565.
Abstract
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Measurements of electromagnetic shielding effect using HTSC materials.
Vidyalal, V.; Rajasree, K.; Vallabhan, C. P. G.. Opto-Electronic Lab.,
Cochin Univ. of Sci. and Technology, Cochin, India. Mod. Phys. Lett. B
(1996), 10(7), 293-297.
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Electron density determination of laser induced plasma from polymethyl
methacrylate using phaseshift detection techniques. Varier, Geetha K.;
Harilal, S. S.; Bindhu, C. V.; Issac, Riju C.; Nampoori, V. P. N.;
Vallabhan, C. P. G.. Mod. Phys. Lett. B (1996), 10(6), 235-239.
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A
study of photoacoustic effects and optical limiting in the solution of C60
in toluene. Issac, Riju C.; Bindhu, C. V.; Harilal, S. S.; Varier,
Geetha K.; Nampoori, V. P. N.; Vallabhan, C. P. G. Mod. Phys. Lett. B
(1996), 10(1 & 2), 61-67.
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Measurement of the absolute fluorescence quantum yield of rhodamine B
solution using a dual-beam thermal lens technique. Bindhu, C. V.;
Harilal, S. S.; Varier, Geetha K.; Issac, Riju C.; Nampoori, V. P. N.;
Vallabhan, C. P. G. J. Phys. D: Appl. Phys. (1996), 29(4), 1074-9.
Abstract
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Measurement of the absolute fluorescence quantum yield of rhodamine B
solution using a dual-beam thermal lens technique. Bindhu, C. V.;
Harilal, S. S.; Varier, Geetha K.; Issac, Riju C.; Nampoori, V. P. N.;
Vallabhan, C. P. G. J. Phys. D: Appl. Phys. (1996), 29(4), 1074-9.
Abstract
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Electrical conductivity and thermal diffusivity of zinc naphthalocyanine.
Thomas, J.; Pillai, V. N. Sivasankara; Xavier, E.; Vallabhan, C. P. G.. J.
Mater. Sci. Lett. (1996), 15(2), 151-2.
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Evanescent wave sensor to monitor the etching rate of an optical fiber.
Lovely, M. R.; Radhakrishnan, P.; Nampoori, V. P. N.; Vallabhan, C. P. G.
Indian J. Pure Appl. Phys. (1996), 34(1), 34-5.
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Publications-1995 |
Photoacoustic study of the effect of degassing temperature on thermal
diffusivity of hydroxyl loaded alumina.
Raman, S. Sankara; Nampoori, V. P. N.; Vallabhan, C. P. G.; Ambadas,
G.;Sugunan,S.
Appl. Phys. Lett.(1995),67(20),2939
Abstract
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Photoemission optogalvanic
effect near the instability region of a hollow cathode discharge. Sasi
Kumar, P. R.; Nampoori, V. P. N.; Vallabhan, C. P. G,
Optical Communication (1995),
118(5,6), 525-8.
Abstract
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Characterization of potassium-doped GdBa2Cu3O7-d using Raman
spectroscopy and x-ray diffraction. Thomas, Preethi Cicily; Manoj,
Kumar K.; Nayar, V. Unnikrishnan; Vidyalal, V.; Vallabhan, C. P. G .
Mod. Phys. Lett. B (1995), 9(26 & 27), 1739-52.
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Laser induced thermal lens effect in rhodamine B - signature of resonant
two photon absorption. Bindhu, C. V.; Harilal, S. S.; Issac,
Riju C.; Varier, Geetha K.; Nampoori, V. P. N.; Vallabhan, C. P. G..
Mod. Phys. Lett. B (1995), 9(22), 1471-7.
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CW-Ar+ laser induced structural and optical properties of amorphous
Sb2Se3 films. Jayakumar, S.; Balasubramanian, C.; Narayandass,
Sa. K.; Mangalaraj, D.; Vallabhan, C. P. G. Vallabhan. Mater. Res. Bull.
(1995), 30(9), 1141-51.
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Observation of multiphoton process in liquid CS2 using pulsed
photoacoustic technique. Harilal, S. S.; Issac, Riju C.; Bindhu,
C. V.; Varier, Geetha K.; Nampoori, V. P. N.; Vallabhan, C. P. G. Mod.
Phys. Lett. B (1995), 9(14), 871-6.
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Pulsed photoacoustic technique to study nonlinear processes in liquids:
results in toluene. Bindhu, C. V.; Harilal, S. S.; Issac, Riju
C.; Varier, Geetha K.; Nampoori, V. P. N.; Vallabhan, C. P. G. Pramana
(1995), 44(3), 231-5.
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Anomalous variation of thermal lens signal with concentration from
Rhodamine B in methanol solution. Bindhu, C. V.; Harilal, S. S.;
Issac, Riju C.; Varier, Geetha K.; Nampoori, V. P. N.; Vallabhan, C. P.
G. Pramana (1995), 44(3), 225-9.
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Subcritical Hopf bifurcation in Ne-Nd hollow cathode discharge.
Sasi Kumar, P. R.; Nampoori, V. P. N.; Vallabhan, C. P. G. Phys. Lett. A
(1995), 199(5,6), 416
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Detection of phase transitions in liquid crystals using the mirage
effect. Rajasree, K.; Vidyalal, V.; Radhakrishnan, P.; Nampoori,
V. P. N.; Vallabhan, C. P. G.; george, A. K. Liq. Cryst. (1995), 18(1),
167-9.
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