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 Publications-2005 |
International Conference on Optoelectronic Materials
and Thin Film Technology.
Ritty J.Nedumpara, Bindu Krishnan, V.P.N Nampoori, P. Radhakrishnan.International Conference on
Optoelectronic Materials and Thin films for Advanced Technology (OMTAT), Cochin,India, October (2005). |
Investigations
of the Random Lasing from a Gain Media with Nanosize Scatterers.
Ritty J. Nedumpara, Bindu Krishnan, V.P.N Nampoori,
P. Radhakrishnan. International conference on optics and
optoelectronics (ICOL), Dehradoon ,India,
December 12-15, (2005). |
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Dual-beam thermal lens and Zscan studies of thermo optical
properties of some nonlinear materials.
A Santhi, Vinu V
Namboodiri, V P N Nampoori and P Radhakrishnan,
Lasers and Applications in Science
and Engineering (Photonics west),
San Jose, California, USA, January 22-27, (2005). |
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Flexible nanocomposite films
with selective optical filtering. Bindu
Krishnan, Denny Alappatt, Litty Irimpan, Raghu Natarajan ,V P N
Nampoori, International Conference on
Optoelectronic Materials and Thin films for Advanced Technology (OMTAT),
Cochin, India, October 24-27, (2005) |
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Significance of
parameter fluctuation rates in coupled directly modulated
semiconductor laser systems.
P. U. Jijo, M.P. John and V. M. Nandakumaran, ICOL - 2005,
Dehradun, December 12-15, (2005). |
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Publications-2004 |
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Control of chaos
and noise induced instabilities in a Duffing oscillator with
amplitude modulated feedback. P. U. Jijo, M.P.John, S. Rajesh
and V. M. Nandakumaran, Perspectives in Nonlinear Dynamical
Systems 2004 (PNLD - 2004), Chennai, 2004
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Refractive index
measurement using multimode fibers with long period grating.
V V Namboodiri, A V Scaria, V P N Nampoori, V M Nandakumaran and P
Radhakrishnan, Photonics Europe 2004, Strasbourg, France
(2004). |
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Thermal characterization of liquid
crystal mixtures using photoacoustic technique. Sajan D George,
A. K. George, P Radhakrishnan, V. P. N. Nampoori and C. P. G.
Vallabhan, Photonics 2004 (Seventh International conference on
Optoelectronics, Fiber optics and Photonics), Cochin, India,
December 9-11, (2004). |
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A Fiber optic
distributed sensor to characterize the properties of concrete mix. M Rajesh, M Sheeba K Geetha, P Radhakrishnan, C P G
Vallabhan & V P N Nampoori,
Photonics 2004 (Seventh International conference on
Optoelectronics, Fiber optics and Photonics),
Cochin, India, December 9-11, (2004). |
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Fiber optic sensor
for the detection of paraffin oil traces in coconut oil.
M Rajesh, M Sheeba, K Geetha, P Radhakrishnan, C P G Vallabhan & V P
N Nampoori,
Photonics 2004 (Seventh International conference on Optoelectronics,
Fiber optics and Photonics), Cochin,
India, December 9-11, (2004). |
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Design of a
refractometer with wide dynamic range using side polished polymer
optical fibre.
K. Geetha, M. Rajesh, C.P.G. Vallabhan , V.P.N. Nampoori and
P.Radhakrishnan,
Photonics 2004 (Seventh International conference on Optoelectronics,
Fiber optics and Photonics), Cochin,
India, December 9-11, (2004). |
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Free electron lasing by combined axial - wiggler
magnetic field embedded in rippled plasma.
R. Pratap, Photonics 2004 (Seventh
International conference on Optoelectronics, Fiber optics and
Photonics), Cochin, India, December 9-11, (2004).
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Many – body correction to the blue shift in GaInAs/InP/InAsP
composite quantum wells.
K S Romov,
A. Yu .Silov , B Aneeshkumar , J. H Wolter , A . A Kuznetsov and N.S
.Averkiev, 12th int. Symp “Nanostructurs; Physics and technology”,
St. Petersburg, Russia, (2004). |
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Effect of
parameter fluctuations in coupled directly modulated semiconductor
lasers.
M. P. John, P. U. Jijo and V. M.Nandakumaran.
Photonics 2004
(Seventh International conference on Optoelectronics, Fiber optics
and Photonics), Cochin, India, December
9-11, (2004). |
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Studies On
Backscattering Of Laser Light In Colloidal Silica.
Litty Irimpan, V.J Dann, Bindu Krishnan, A.Deepthy, V.P.N Nampoori
and P Radhakrishnan.
Photonics 2004 (Seventh International conference on
Optoelectronics, Fiber optics and Photonics),
Cochin, India, December 9-11, (2004). |
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Backscattering
from nano-sized ZnO suspensions.
Bindu Krishnan, A. Deepthy, Litty Irimpan, Dann.V.J, V.P.N Nampoori,
Photonics
2004(Seventh International conference on Optoelectronics, Fiber
optics and Photonics), Cochin, India,
December 9-11, (2004). |
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Stabilization of
quasiperiodic and chaotic pulses from a directly modulated self
pulsating semiconductor laser.
S.Rajesh and V. M. Nandakumaran.
Photonics 2004 (Seventh International conference
on Optoelectronics, Fiber optics and Photonics),
Cochin, India, December 9-11, (2004). |
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Third Order
Nonlinear Optical properties of ZnO Thin Films using Z-Scan
Technique.
A Deepthy, D Ambika, Sajan D George, V Kumar and V P N Nampoori,
Photonics 2004
(Seventh International conference on Optoelectronics, Fiber optics
and Photonics), Cochin, India, December
9-11, (2004). |
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Saturable
Absorption in Plasma polymerized Aniline Thin films Probed by Z-Scan
Technique.
U S Sajeev, Vinu V Namboodiri, Anwar Salah, A.Deepthi,
V P N Nampoori, P Radhakrishnan, M R Anantharaman,
Photonics 2004 (Seventh
International conference on Optoelectronics, Fiber optics and
Photonics), Cochin, India, December 9-11,
(2004). |
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Nonlinear Optical
Absorption in Multilayer BaTiO3 Thin Films.
Anwar Salah, V. V.
Namboodiri, A. Deepthy, V. Kumar, V. P. N. Nampoori and P.
Radhakrishnan,
Photonics 2004 (Seventh International conference on Optoelectronics,
Fiber optics and Photonics), Cochin, India, December 9-11,
(2004). |
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Study of the
Effect of Electronic Energy Transfer on pH in Organic Dye Mixtures
Using Dual Beam Thermal Lens Technique.
Achamma Kurian, V P N
Nampoori and C P G Vallabhan,
Photonics 2004 (Seventh International conference on
Optoelectronics, Fiber optics and Photonics),
Cochin, India, December 9-11, (2004). |
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nvestigation of
transport properties of intrinsic semiconductors using open cell
photoacoustic technique.
Sajan D George, P. Radhakrishnan, V. P. N. Nampoori and C. P. G.
Vallabhan,
Photonics 2004 (Seventh International conference on Optoelectronics,
Fiber optics and Photonics), Cochin,
India, December 9-11, (2004). |
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Energy transfer and optical gain studies of FDS: Rh B dye
mixture investigated under CW laser excitation.
M. Kailasnath, G. Ajith Kumar, V.P.N Nampoori,
Photonics 2004 (Seventh International
conference on Optoelectronics, Fiber optics and Photonics),
Cochin, India, December 9-11, (2004). |
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Photosensitivity
of Laser Dye Mixtures in Polymer Matrix. A Photoacoustic Study. Annieta Philip K, Lyjo K. Joseph, Litty Irimpan, P.
Radhakrishnan and V. P.N. Nampoori,
Photonics 2004 (Seventh
International conference on Optoelectronics, Fiber optics and
Photonics), Cochin, India, December 9-11,
(2004). |
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Ultrashort mach – Zehnder space
switch based on quantum dots, R Prasanth ,
J E M HaverKort , J H Wolter , smart structure and materials ,
SPIE Conference 5383 , San Diego , USA (2004). |
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Synchronization of
chaos in unidirectionally coupled modulated self pulsating
semiconductor lasers: effects of delay and detuning. S Rajesh
and V M Nandakumaran, Proc. of the international conference,
Perspectives in Nonlinear Dynamics (PNLD 2004), IIT Madras,
Chennai, July (2004). |
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Coherent
backscattering from nanosized ZnO..
Bindu Krishnan, A Deepthy, Litty Irimpan, Dann V J, V P N Nampoori.
Photonics 2004, Seventh International Conference on
Optoelectronics, Fiber Optics, and Photonics , Cochin ,India
9-11, December (2004 ). |
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Publications-2003
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Fiber optic evanescent wave sensor for ammonia gas.
P Suresh Kumar, Abraham V S, Thomas Lee S, C P G Vallabhan, V P N Nampoori and P
Radhakrishnan , APOC 2003 (Materials, Active Devices, and Optical Amplifiers),
Wuhan, China, Novemeber 2-6,
(2003)
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Long-period grating in multimode fiber for ammonia gas detection.
P Suresh Kumar, Abraham V S, C P G Vallabhan, V P N Nampoori and P Radhakrishnan,
APOC 2003 (Optical Fibers and Passive Components),
Wuhan, China, Novemeber 2-6,
(2003)
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Investigation of
Thermal and Transport properties of intrinsic and doped Si using Open
Cell Photoacoustic Technique.
Sajan D George, P. Radhakrishnan, V. P. N. Nampoori and C. P. G. Vallabhan
, APOC 2003,
Wuhan, China, Novemeber 2-6,
(2003)
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Laser induced nondestructive evaluation of transport properties of intrinsic and doped Si.
Sajan D George, P Radhakrishnan, V P N Nampoori and C P G Vallabhan,
International Conference on Laser Applications and Optical Metrology
(ICLAOM-03), IIT Delhi, India, December 1-4 ( 2003)
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Fibre optic Respiration Sensor.
Rajesh.M, Jibukumar.M.G, C.P.G.Vallabhan, P.Radhakrishnan and V.P.N.Nampoori
, International Conference on Laser Applications and Optical Metrology (ICLAOM-03),
IIT Delhi, India, December 1-4 ( 2003)
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Determination of fluorescence quantum yield of chemical ligand hydroxyphenol salycylaldehyde oxime using dual beam thermal lens method.
Santhi. A, Ritty J.Nedumpara, U.L.Kala, P.Radhakrishnan, C.P.G.Vallabhan, V.P.N.Nampoori
, International Conference on Laser Applications and Optical Metrology (ICLAOM-03),
IIT Delhi, India, December 1-4 ( 2003)
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Excitation wavelength dependence of fluorescence quantum yield of chemical ligand determined using dual beam thermal lens methode.
Santhi.A, Abraham V.S, U.L.Kala,Ritty.J.Nedumpara, P.Radhakrishnan,
C.P.G. Vallabhan and V.P.N.Nampoori
, First International Meeting on Applied Physics (APHYS-2003),
Badajoz, SPAIN, October
14-18 ( 2003)
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Enhancement of thermal lens signal intensity from molecules of Rohodamine 6G dispersed in colloidal silver.
Santhi.A, Abraham V.S, P.Radhakrishnan, C.P.G Vallabhan and V.P.N.Nampoori
, First International Meeting on Applied Physics (APHYS-2003), Badajoz, SPAIN,
October
14-18 ( 2003) |
Laser-induced thermal characterization of nano Ag metal dispersed ceramic alumina
matrix, Sajan. D. George, Aji A Anapara, K. G. K Warrier,
P.Radhakrishnan, C. P. G. Vallabhan and V. P. N. Nampoori, Microtechnolgies for New millennium 2003, Canary Islands, SPAIN, May 19-21 (2003) |
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Publications-2002
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Electrorefraction in Quantum Dots.
R.Prasanth, J.E.M.Haverkort, J.H.Wolter IEEE/LEOS Symposium, Benelux chapter, Amsterdam, The Netherlands, December (2002).
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Macro Bending in Fiber Optic Interferometer Sensor for Displacement and Weight Measurement.
V.P.N. Nampoori, S.Thomas Lee , C.P.G. Vallabhan and P. Radhakrishnan, SPIE
Conference on Transducing Materials and Devices, Brugge, Belgium,
Oct 28-Nov 1.
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Fibre Optic Evanescent Ammonia Sensor.
Suresh Kumar P, C.P.G. Vallabhan, V.P.N. Nampoori and P. Radhakrishnan, SPIE
Conference on Transducing Materials and Devices, Brugge, Belgium,
Oct 28-Nov 1.
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Fibre Optic Evanescent Chromium Sensor.
Suresh Kumar P, C.P.G. Vallabhan, V.P.N. Nampoori and P. Radhakrishnan,
APOC-2002, Shanghai, China, Oct 14-18 (2002).
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Studies on Optical Loss Coefficient in Plastic Waveguide.
K. Geetha, Pramod Gopinath, K P Unnikrishnan, C. P. G. Vallabhan, V. P. N. Nampoori and P.
Radhakrishnan, APOC-2002, Shanghai, China, Oct 14-18 (2002). |
Investigation of Transport Properties of Doped GaAs Epitaxial Layers using Open Photo Acoustic Cell.
S.D. George, Dilna S, P. Radhakrishnan, C.P.G. Vallabhan and V.P.N.
Nampoori. Photonics Asia-2002, Shanghai, China, Oct 14-18
(2002). |
A Microbent Optical Fibre for Refractive Index Measurement.
S.Thomas Lee, V.P.N. Nampoori , C.P.G. Vallabhan and P. Radhakrishnan. Photonics
Asia-2002, Shanghai, China, Oct 14-18 (2002). |
An LED based Fibre Optic Evanescent Wave Sensor for Simultaneous Detection of Chromium and Nitrate Traces in Water.
Suresh Kumar P, C.P.G. Vallabhan, V.P.N. Nampoori and P. Radhakrishnan, Photonics-
2002, TIFR, Mumbai, India, Dec 16-18 (2002). |
Control of Chaos in Directly Modulated Semiconductor Lasers.
Rajesh S and V.M. Nandakumaran, Photonics- 2002, TIFR, Mumbai,
India, Dec 16-18 (2002). |
Modes in Planar Waveguides Based on Sol-gel Derived Thin Films of Nano ZnO.
K.Geetha, T.Anto Johny, C.P.G. Vallabhan, V.P.N. Nampoori and P. Radhakrishnan,
Photonics- 2002, TIFR, Mumbai, India, Dec 16-18 (2002). |
Determination of molecular distance in organic dye mixtures using dual beam thermal lens technique.
Achamma Kurian, Sajan D George, V P N Nampoori and C P G Vallabhan,
Photonics- 2002, TIFR, Mumbai, India, Dec 16-18 (2002). |
Use of Photo Acoustic Technique to Measure the Thermal Diffusivity and Phase Transition in Liquid Crystals.
S.D. George, Dilna S, P. Radhakrishnan, C.P.G. Vallabhan and V.P.N.
Nampoori, Photonics- 2002, TIFR, Mumbai, India, Dec 16-18 (2002). |
Long Period Grating Fibres for Chemical Sensing.
S.Thomas Lee, R. Dinesh Kumar, V.P.N. Nampoori ,C.P.G. Vallabhan and P.
Radhakrishnan, Photonics- 2002, TIFR, Mumbai, India, Dec 16-18
(2002). |
Non Linear Absorption in a Bis-Phthalocyanine : Sm(Pc)2.
K.P. Unnikrishnan, Jayan Thomas ,V.P.N. Nampoori and C.P.G. Vallabhan, Photonics-2002, TIFR, Mumbai,
India, Dec 16-18 (2002). |
Large excitonic blue shift in composite quantum wells.
B Aneeshkumar, A Yu Silov, J H Wolter , 26th International
Cononference on Physics of Semiconductors, Edinburgh, Scotland,
July 29-Aug 2 ( 2002).
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Separate electron-hole confinement in composite InAsyP1–y/GaxIn1–xAs quantum wells.
A. Yu. Silov, B. Aneeshkumar, M. R. Leys, N. S. Averkiev, P. C. M. Christianen and J. H. Wolter
, 10th International Symposium- Nanostructures: Physics and Technology,
St Petersburg, Russia, June 17–21 ( 2002).
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Fibre Optic Evanescent Ammonia Sensor.
Suresh Kumar P, C.P.G. Vallabhan, V.P.N. Nampoori and P. Radhakrishnan,
9th International Meeting on Chemical Sensors (IMCS-2002), Boston,
USA, July 7-10 (2002).
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Publications-2001
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Photoacoustic study of thermotropic liquid crystals.
Nibu A George, C P G Vallabhan, V P N Nampoori, P Radhakrishnan,
C Carboni and A K George , 5th Gordon Research Conference on
Photoacoustic and Photothermal Phenomena, Queens College, Oxford,
UK, Aug
19-24 ( 2001).
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Thermal
characterization of doped InP using photoacoustic technique. George,
Sajan D.; Kurian, Achamma; Lase, Martin; Nampoori, V. P. N.; Vallabhan, C.
P. G. Proceedings of SPIE-The International Society for Optical
Engineering 4595 (Photonic Systems and Applications), (2001).
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Realization of optical logic gates using thermal lens effect.
Achamma Kurian, K P Unnikrishnan, Pramod Gopinath, Binoy Paul, V P N Nampoori and C P G Vallabhan
,Proceedings of SPIE-The International Society for Optical Engineering (2001), 4595(Photonic Systems and
Applications), (2001).
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Influence
of laser irradiance and helium ambient on the expansion of laser-produced
carbon plasma. Harilal, S. S.; Bindhu, C. V.; Nampoori, V. P. N.;
Vallabhan, C. P. G., Proc. SPIE-Int. Soc. Opt. Eng. 4424(Laser
Interaction with Matter), (2001). |
Fiber optic pH sensor with dye-doped multilayer sol-gel coatings. Lee, Thomas S.; Jose, Gin;
Manju,C. M.; Joseph, Betty; John, M. Shelly;Radhakrishnan, P.Nampoori, V. P. N.;
Vallabhan, C. P. G.; Unnikrishnan, N. V. ,Proc. SPIE-Int. Soc. Opt. Eng., 4417(Photonics
2001),
(2001).
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Thermal diffusivity of doped InP using OPC.
Sajan D George, C. P. G. Vallabhan, Martin Leys and V. P. N. Nampoori, Second Interntional Conference and XXVII annual conference of photonic society of India,
Thiruvanthapuram, India, Aug 27-29 (2001).
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Compact Match-Zender Space switch combining bandfilling and the quantum confined stark
effect. R.Prasanth, J.E.M.Haverkort, J.H.Wolter, IEEE/LEOS Symposium, Benelux
Chapter, Brussel, Belgium, December (2001).
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Fibre Optic Evanescent Wave Sensor for Nitrites in Water.
P.Suresh Kumar, C.P.G. Vallabhan, V.P.N. Nampoori and P. Radhakrishnan, OPTONICS 2001,
Thiruvanthapuram, India, Aug 27-29 (2001).
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Publications-2000
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Blue stark shift in composite quantum wells.
A.Yu. Silov, B. Aneeshkumar, M.R. Leys, H. Vonk, and J.H. Wolter, 25th Intern. Conf. Physics of Semiconductors,
Osaka, Japan, Sept 17-22,
(2000).
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Characterization of an optical fiber sensor in detecting NO2 gas.
M S John, K P Unnikrishnan, Jayan Thomas, P Radhakrishnan, V PN Nampoori and C P G Vallabhan,
PHOTONICS-2000 (International conference on fiber optics and photonics), Culcuta
India, Dec 18-20,
(2000). |
Composite Quantum Wells on InP for blue Stark shift.
A.Yu. Silov, B. Aneeshkumar, M.R. Leys, H. Vonk, J.H. Wolter, 5th Ann. Symp. of the IEEE/LEOS Benelux Chapter,
Delft, The Netherlands, Oct. 30,
(2000). |
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Publications-1999
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Passive organic solid-state optical limiter based on enhanced excited state absorption.
B Aneeshkumar, P Gopinath, J Thomas, N A George, P Radhakrishnan, V P N Nampoori and C P G Vallabhan,
SPIE's 44th Annual Meeting - The International Symposium on Optical Science, Engineering, and Instrumentation -Tech. Conference
3798, Colorado Convention Center,
USA, July 18-23,(1999). |
Photoacoustic Monitoring of Nematic to Isotropic Transition in the Liquid Crystal BL001.
Nibu A George, C P G Vallabhan, V P N Nampoori, A K George and P Radhakrishnan,
International Conference on Laser Devices and Materials, DSC, New Delhi,
India, Dec 8-10, (1999).
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Optical limiter using samarium phthalocyanine (SmPc) doped copolymer matrix.
B Aneeshkumar, P Gopinath, J Thomas, Nibu A George, G Kumar, P Radhakrishnan, V P N Nampoori and C P G Vallabhan,
International Symposium on Photonics and Applications (SPIE) - Conference 3896, Shangri-La Hotel,
Singapore, Nov 29-Dec 3, (1999). |
NO2 detection with a fiber
optic evanescent wave sensor.
Mechery, John Shelly; Thomas, Jayan; Unnikrishnan, K. P.;
Radhakrishnan, P.; Nampoori, V. P. N.; Vallabhan, C. P. G.
, Proc. SPIE-Int. Soc. Opt. Eng. 3897(Advanced Photonic Sensors and
Applications), (1999). |
A Polarization Independent MZI space switch with a 0.64 mm phase shifter and a low crosstalk penalty.
B.H.P.Dorren, R.Prasanth, J.E.M.Haverkort, F.H.Groen, J.H.Wolter, IEEE/LEOS symposium, Benelux
Chapter, Mons, Belgium, November (1999).
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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). |
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Publications-1998
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Photoacoustic study on photobleaching of Rhodamine 6G doped in poly methyl methacrylate.
Nibu A George, B Aneeshkumar, P Radhakrishnan and C P G Vallabhan,
International Conference on Optics and Optoelectronics, IRDE,
Dehradun, India, Dec 9-12, (1998). |
Multiphoton absorption
studies in aqueous solutions of rhodamine 6G laser dye using transient thermal
lens technique.
Bindhu,
C. V.; Harilal, S. S.; Bindu, V.; Nampoori, V. P. N.; Vallabhan, C. P. G.,
International Conference on Optics and Optoelectronics, IRDE,
Dehradun, India, Dec 9-12, (1998). |
Evolutional dynamics of laser generated plasma from silicon carbide. Pramod Gopinath, Riju C Issac, Geetha K Varier, S S Harilal, Binoy Paul, V P N Nampoori, C P G
Vallabhan,
International Conference on Optics and Optoelectronics, IRDE,
Dehradun, India, Dec 9-12, (1998). |
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Publications-1997
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Publications-1996
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Photoemission optogalvanic
effect: theory and applications.
Prasad, K. C. Ajith; Nampoori, V. P. N.; Sasikumar, P. R.; Vallabhan, C.
P. G. ,International Conference on Spectroscopy,
(1996).
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Publications-1995 |
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