Profile

Dr. K. GEETHA MSc., PhD Assistant ProfessorE-mail : This email address is being protected from spambots. You need JavaScript enabled to view it. Phone : +91 9744956436

 

Profile

ACADEMIC RECORD

Doctor of Philosophy (2007) with subject of Specialization (Photonics) entitled the thesis Design, Fabrication and Characterization of Passive and Active Polymer Photonic Devices from Cochin University of Science and Technology

Post Graduate Diploma in Computer Applications (PGDCA) (1999)

Masters Degree in Physics Mahatma Gandhi University in 1998

MEMBERSHIPS

Life member, Photonics Society of India

ESEARCH INTERESTS

Dye doped polymer and conjugated polymer photonic devices, Waveguide lasers, Fiber optic sensors and amplifiers, Microcavity devices, Nonlinear Optics, Nano photonics

TEACHING EXPERIENCE

Lecturer on Contract basis, International School of Photonics, Cochin University of Science and Technology, Kochi, from 2010 June to 2010 August

Lecturer on Contract basis, Centre of Excellence in Lasers and Optoelectronic Sciences, Cochin University of Science and Technology, Kochi, from 2005 December to 2007 June.

RESEARCH EXPERIENCE

Research Associate, Centre of Excellence in Lasers and Optoelectronic Sciences, Cochin University of Science and Technology, Kochi from 2007 June to 2010June.

Research Scholar, International School of Photonics, Cochin University of Science and Technology, Kochi, from June 2000 to June 2006.

Awards

ACADEMIC RECOGNITIONS/AWARDS

Received 3rd rank for MSc Physics (1998) from M.G. University

Joint CSIR-UGC test for JRF and Eligibility for Lectureship (NET) on 1999

Publications

PUBLICATIONS

G. Sreelekha, G Vidya ,M S Ebin, K Geetha ,S Sreeja, Rani Joseph, S Pratapan,P Radhakrishnan, C P G Vallabhan and V P N Nampoori , “ Two photon fluorescence spectra from MEH-PPV/Polystyrene based film waveguides ", Journal of Optics, OSI (42(2), pp. 101-105, (2013).

G.Sreelekha, G. Vidya, K. Geetha, Rani Joseph ,S. Prathapan , P. Radhakrishnan , C.P.G. Vallabhan and V.P.N. Nampoori “ Characteristics of Dual Amplified Spontaneous Emission from MEH-PPV solutions", International journal of Optics and Photonics,5(1), pp. 3-12, (2011) .

G.Sreelekha, G. Vidya, K. Geetha, M.S. Ebin, Rani Joseph ,S. Prathapan , P. Radhakrishnan ,C.P.G. Vallabhan and V.P.N. Nampoori, “Laser resonant modes from MEH-PPV dissolved in tetrahydrofuran", International journal of Photonics, 3(1), pp. 31-38, (2011) .

G.Sreelekha, G. Vidya, K. Geetha, Rani Joseph, S. Prathapan, P. Radhakrishnan, C.P.G. Vallabhan and V.P.N. Nampoori, “Multimode emissions from MEH-PPV blended with Polystyrene film waveguides”, International Journal of optics and photonics, 5(2), pp. 111-120, (2011) .

K. Geetha, M. Rajesh, V.P.N. Nampoori, C.P.G. Vallabhan and P.Radhakrishnan “Propagation characteristics and wavelength tuning of amplified spontaneous emission from dye doped polymer”, Appl. Opt. 45, 764-769 (2006)

K. Geetha, M. Rajesh, V.P.N. Nampoori, C.P.G. Vallabhan and P.Radhakrishnan “Laser emission from transversely pumped dye-doped free-standing polymer film”, J.Opt. A: Pure Appl. Opt. 8 , 189-193 (2006)

K Geetha, M Rajesh, V P N Nampoori, C P G Vallabhan and P Radhakrishnan “Loss characterization in Rhodamine 6G doped polymer film waveguide by side illumination fluorescence”, J. Opt. A: Pure Appl. Opt. 6, 379–383 (2004).

K Geetha, Pramod Gopinath, K P Unnikrishnan, S Thomas Lee, V P N Nampoori, C P G Vallabhan and P Radhakrishnan, “ Studies on optical loss coefficient in plastic waveguides”, Proceedings of SPIE, No. 4904, 382-390 (2002).

Ritty J Nedumpara, K Geetha, V J Dann, C P G Vallabhan, V P N Nampoori and P Radhakrishnan “Light amplification in dye doped polymer films”, J. Opt. A: Pure Appl. Opt. 9, 174-179 (2007).

M Rajesh, M Sheeba, K Geetha, C P G Vallabhan, P Radhakrishnan and V P N Nampoori, “Fabrication and characterisation of dye doped polymer optical fiber as light amplifier”, Appl. Opt. 46, 106-112 (2007)

M Rajesh, K Geetha, M Sheeba, P Radhakrishnan, C P G Vallabhan and V P N Nampoori, “A fiber optic smart sensor for studying the setting characteristics of various grades of cement”, Optics and Lasers in Engg 44(5), 486-493 (2006).

M Rajesh, K Geetha, M Sheeba, P Radhakrishnan C P G Vallabhan and V P N Nampoori, “Characterization of Rhodamine 6G doped polymer optical fiber by side illumination fluorescence”, Opt. Engg 45(7), 075003 1-4 (2006).

S. Thomas Lee, K Geetha, V.P.N. Nampoori, C.P.G. Vallabhan and P.Radhakrishnan, “ Microbent optical fibers as evanescent wave sensors”, Opt. Engg 41,3260-3264 (2002).

Conference Presentation

Conference presentation

G.Sreelekha, G. Vidya, K. Geetha, M.S. Ebin, Rani Joseph ,S. Prathapan, P. Radhakrishnan ,C.P.G. Vallabhan and V.P.N. Nampoori ,“ Photoluminescence of MEH-PPV/PS based planar waveguide structure ", International Conference on Recent Trends in Materials Science and Technology(ICMST) October 29-31, 2010 at Thiruvananthapuram, Kerala.

G.Sreelekha, G. Vidya, M.S. Ebin, K. Geetha, Rani Joseph ,S. Prathapan , P. Radhakrishnan ,C.P.G. Vallabhan and V.P.N. Nampoori ,“ Laser emission from MEH-PPV/PS based planar waveguide structure ", International Conference on Fiber Optics and Photonics 2010 at Indian Institute of Technology, Guwahati, during December 11-15, 2010.

G.Sreelekha, G. Vidya ,K. Geetha, P. Radhakrishnan , Rani Joseph ,S. Prathapan ,C.P.G. Vallabhan and V.P.N. Nampoori ,“ Dual wavelength Amplified Spontaneous Emission from MEH:PPV”; Ninth DAE-BRNS National Laser Symposium 13th-16th January, 2010 Organized at BARC, Mumbai.

G.Sreelekha, G. Vidya ,K. Geetha, P. Radhakrishnan , Rani Joseph ,S. Prathapan ,C.P.G. Vallabhan and V.P.N. Nampoori “ Multimode emission from MEH-PPV dissolved in tetrahydrofuran ", DAE-BRNS National Laser Symposium" at RRCAT, Indore from Dec.1-4, 2010 .

G.Sreelekha, G. Vidya, A. Santhi, K. Geetha, Rani Joseph ,S. Prathapan , P. Radhakrishnan, C.P.G. Vallabhan and V.P.N. Nampoori ,“ Measurement of the absolute fluorescence quantum yield of MEH-PPV solution using a dual-beam thermal lens technique ",Kerala Women’s Science Congress 2010, at St. Teresa’s College, Ernakulam on August 10- 12, 2010.

M S Ebin, G Sreelekha, S Sreeja, P Radhakrishnan, V P N Nampoori ,C P G Vallabhan ,K Geetha ,G Vidya, Rani Joseph and S Pratapan ,“ Two photon fluorescence spectra of MEH-PPV/PS blend films under femtosecond irradiation ", International Conference on Recent Trends in Materials Science and Technology(ICMST) October 29-31, 2010 at Thiruvananthapuram.

K. Geetha, G. Sreelekha, G. Vidya, Rani M Joseph, C P G Vallabhan, P Radhakrishnan and V P N Nampoori, “ Thickness effects on the fluorescence spectra of MEH:PPV/PMMA thin film waveguides”, Proceedings of National Laser Symposium NLS-08, Jan 7-10, Delhi(2009).

K. Geetha, M. Rajesh, C.P.G. Vallabhan , V.P.N. Nampoori and P.Radhakrishnan, “Design of a refractometer with wide dynamic range using side polished polymer optical fibre”, Proceedings of Seventh International Conference on Optoelectronics, Fiber Optics and Photonics ( PHOTONICS 2004) Dec 9-11, Kochi (2004).

M Rajesh, M Sheeba, K Geetha, P Radhakrishnan, C P G Vallabhan and V P N Nampoori, “A Fiber optic distributed sensor to characterize the properties of concrete mix”, Proceedings of Seventh International Conference on Optoelectronics, Fiber Optics and Photonics ( PHOTONICS 2004) Dec 9-11, Kochi (2004).

M Rajesh , M Sheeba , K Geetha , P Radhakrishnan, C P G Vallabhan and V P N Nampoori, “Fiber optic sensor for the detection of paraffin oil traces in coconut oil”, Proceedings of Seventh International Conference on Optoelectronics, Fiber Optics and Photonics ( PHOTONICS 2004) Dec 9-11, Kochi (2004).

M Rajesh, M Sheeba, K Geetha, C P G Vallabhan, P Radhakrishnan and V P N Nampoori, “Fabrication of Polymer Optical Fiber based amplifiers” , ICOL-2005,12-15 December, IRDE -Dehradun, India (2005).

M Rajesh, K Geetha, M Sheeba, C P G Vallabhan, P Radhakrishnan and V P N Nampoori, “Side Illumination Fluorescence Technique for Loss Characterization of Dye Doped POF”, NLS-2005, Vellore Institute of Technology-Vellore, Tamilnadu, India(2005).

K. Geetha, M. Rajesh, V. P. N. Nampoori, C.P.G. Vallabhan and P. Radhakrishnan, “Side Illumination Fluorescence Technique for the characterization of optical loss in Dye doped planar waveguides”, National Laser Symposium 2003, Kharagpur.(2003).

K. Geetha, T. Anto Johny, V. Kumar, C P G Vallabhan, V P N Nampoori and P Radhakrishnan “Modes in planar waveguides based on sol-gel derived thin films of nano ZnO” Prooceedings of Sixth International Conference on Optoelectronics, Fiber Optics and Photonics (PHOTONICS 2002), Dec 14-16, Mumbai (2002).

K Geetha, Pramod Gopinath, K P Unnikrishnan, S Thomas Lee, V P N Nampoori, C P G Vallabhan and P Radhakrishnan, “ Side Illumination Fluorescence studies in dye doped polymer waveguide”, Proceedings of National Laser Symposium 2001, Dec 19-21, CAT Indore, p141-142 (2001).

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