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 Publications-2008 |
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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
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Microbent Optical Fibers as Evanescent Wave Sensors
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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
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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
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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
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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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text
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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), | |
