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Dr. K. Geetha

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Dr. K. Geetha
Assistant Professor & Head
E-mail: geethadas@gmail.com
Brief info

MSc., PhD

Dr. Geetha K, M.Sc., Ph.D

Address:

Department  of Physics, Sree Krishna College Guruvayur, Thrissur, PIN – 680102, KERALA

Email : geethadas@gmail.com

Education
  • Ph.D (Photonics)  : Cochin University of Science and Technology (2007)
  • Post Graduate Diploma in Computer Applications (PGDCA) : IHRD (1999)
  • M.Sc. (Physics) : Mahatma Gandhi University, Kottayam (1998)
Awards /Fellowship
  • Received 3rd rank for MSc Physics from M.G University (1998)
  • CSIR- JRF and Eligibility for Lectureship (NET) (1999).
  • CSIR-SRF (2002)
Research interests
  • Dye doped polymer photonic devices, Fibre optic sensors and amplifiers, Nonlinear Optics, Nanophotonics
Positions Held
  • Assistant Professor, Dept. of Physics, Sree Krishna College, Guruvayur (6 Aug 2010- Present)
  • Lecturer, International School of Photonics, Cochin University of Science and Technology, Kochi – 22 from  June 2010 to August 2010 (on contract basis)
  • Research Associate, Centre of Excellence in Lasers and Optoelectronic Sciences, Cochin University of Science and Technology, Kochi-22, from  2007 June to 2010 June
  • Lecturer, Centre of Excellence in Lasers and Optoelectronic Sciences, Cochin University of Science and Technology, Kochi, from 2005 December to 2007 June (on contract  basis)
Publications
  1. Two photon fluorescence spectra from MEH-PPV/Polystyrene based film waveguides, G. Sreelekha, G Vidya ,M S Ebin, K Geetha ,S Sreeja, Rani Joseph, Pratapan, P Radhakrishnan, C P G Vallabhan and V P N Nampoori , Journal of Optics, 42(2), (2013)101-105.
  2. Characteristics of Dual Amplified Spontaneous Emission from MEH-PPV solutions, G.Sreelekha, G. Vidya, K. Geetha, Rani Joseph ,S. Prathapan , P. Radhakrishnan , C.P.G.Vallabhan and V.P.N. Nampoori , International journal of Optics and Photonics, 5(1),(2011) 3-12.
  3. Laser resonant modes from MEH-PPV dissolved in tetrahydrofuran , G.Sreelekha, G. Vidya, K. Geetha, M.S. Ebin, Rani Joseph ,S. Prathapan , P. Radhakrishnan ,C.P.G. Vallabhan and V.P.N. Nampoori, , International journal of Photonics, 3(1), (2011) 31-38.
  4. 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, Appl. Opt. 45, (2006) 764-769.
  5. 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 J.Opt. A: Pure Appl. Opt. 8, (2006) 189-193.
  6. 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.
  7. Studies on optical loss coefficient in plastic waveguides , K Geetha, Pramod Gopinath, K P Unnikrishnan, S Thomas Lee, V P N Nampoori, C P G Vallabhan and P Radhakrishnan, Proceedings of SPIE, No. 4904, (2002) 382-390.
  8. Light amplification in dye doped polymer films, Ritty J Nedumpara, K Geetha, V J Dann, C P G Vallabhan, V P N Nampoori and P Radhakrishnan, J. Opt. A: Pure Appl. Opt. 9, (2007) 174-179.
  9. Fabrication and characterisation of dye doped polymer optical fiber as light amplifier, M Rajesh, M Sheeba, K Geetha, C P G Vallabhan, P Radhakrishnan and V P N Nampoori, Appl. Opt. 46, (2007) 106-112.
  10. 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 Engg 44(5), (2006) 486-493.
  11. Characterization of Rhodamine 6G doped polymer optical fiber by side illumination fluorescence , M Rajesh, K Geetha, M Sheeba, P Radhakrishnan C P G Vallabhan and V P N Nampoori, Opt. Engg 45(7), (2006) 075003 1-4.
  12. Microbent optical fibers as evanescent wave sensors , S. Thomas Lee, K Geetha, V.P.N. Nampoori, C.P.G. Vallabhan and P.Radhakrishnan,, Opt. Engg 41, (2002) 3260-3264.
Seminar / Conference Proceedings
International
  1. Photoluminescence of MEH-PPV/PS based planar waveguide structure, Sreelekha , G. Vidya, K. Geetha, M.S. Ebin, Rani Joseph ,S. Prathapan, P. Radhakrishnan, C.P.G. Vallabhan and V.P.N. Nampoori , International Conference on Recent Trends in Materials Science and Technology(ICMST) October 29-31, at Thiruvananthapuram, Kerala(2010)
  2. Two photon fluorescence spectra of MEH-PPV/PS blend films under femtosecond irradiation, M S Ebin, Sreelekha , S Sreeja, P Radhakrishnan, V P N Nampoori ,C P G Vallabhan ,K Geetha ,G Vidya, Rani Joseph and S Pratapan, International Conference on Recent Trends in Materials Science and Technology(ICMST) October 29-31at Thiruvananthapuram (2010).
  3. Laser emission from MEH-PPV/PS based planar waveguide structure, Sreelekha , G. Vidya, M.S. Ebin, K. Geetha, Rani Joseph ,S. Prathapan , P. Radhakrishnan ,C.P.G. Vallabhan and V.P.N. Nampoori, International Conference on Fiber Optics and Photonics 2010 at Indian Institute of Technology, Guwahati, December 11-15(2010).
  4. Design of a refractometer with wide dynamic range using side polished polymer optical fibre,   Geetha, M. Rajesh,  C.P.G. Vallabhan , V.P.N. Nampoori and P.Radhakrishnan, Proceedings of Seventh International Conference on Optoelectronics, Fiber Optics and Photonics ( PHOTONICS 2004) Dec 9-11, Kochi (2004).
  5. A Fiber optic distributed sensor to characterize the properties of concrete mix, M Rajesh, M Sheeba, K Geetha, P Radhakrishnan, C P G Vallabhan  and V P N Nampoori, Proceedings of Seventh International Conference on Optoelectronics, Fiber Optics and Photonics ( PHOTONICS 2004) Dec 9-11, Kochi (2004).
  6. 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 and V P N Nampoori, Proceedings of Seventh International Conference on Optoelectronics, Fiber Optics and Photonics ( PHOTONICS 2004) Dec 9-11, Kochi (2004).
  7. Fabrication of Polymer Optical Fiber based amplifiers, M Rajesh, M Sheeba, K Geetha, C P G Vallabhan, P Radhakrishnan and V P N Nampoori, , ICOL-2005,12-15 December, IRDE -Dehradun, India (2005).
  8. Modes in planar waveguides based on sol-gel derived thin films of nano ZnO,   Geetha, T. Anto Johny, V. Kumar, C P G Vallabhan, V P N Nampoori and                             P  Radhakrishnan, Proceedings of Sixth International Conference on Optoelectronics, Fiber Optics and Photonics (PHOTONICS 2002), Dec 14-16, Mumbai (2002).
  9. Studies on optical loss coefficient in plastic waveguides, K Geetha, Pramod Gopinath, K P Unnikrishnan, S Thomas Lee, V P N Nampoori, C P G Vallabhan and P Radhakrishnan, APOC-2002,  14-18 October, Shanghai ,China (2002)   (* Received Travel Grant from NUFFIC, The Netherlands)
National
  1. Sucrose mediated synthesis and Characterization of Fluorescent Copper nanocolloids, Meena A G, Sakeeba P V, Sreeja T D and Geetha K, Annual Physics Symposium, St. Teresa’s College, Ernakulam, 7-8 December 2017
  2. Green Synthesis and characterization of Silver and Copper Nano particles, C. Simi Jose T. P. Kavya, T. D. Sreeja, P.S. Vijoy and Geetha, The Annual Physics Symposium, St. Teresa’s College, Ernakulam, 2-3 February 2017.
  3. Biosynthesis and characterization of Silver nanoparticles, Kavya T P, Simi Jose C, Sreeja T D, Vijoy P S, Geetha K, National Seminar on Nanophotonics, Department of Physics, St. Thomas College, Thrissur, 10 Jan 2017.
  4. Dual wavelength Amplified Spontaneous Emission from MEH:PPV, Sreelekha , G. Vidya , K. Geetha, P. Radhakrishnan , Rani Joseph, S. Prathapan, C.P.G. Vallabhan and V.P.N. Nampoori,.  Ninth DAE-BRNS National Laser Symposium 13th-16th January, 2010 Organized at BARC, Mumbai
  5. Multimode emission from MEH-PPV dissolved in tetrahydrofuran, Sreelekha , G. Vidya ,K. Geetha, P. Radhakrishnan , Rani Joseph ,S. Prathapan ,C.P.G. Vallabhan and V.P.N. Nampoori.,   DAE-BRNS National Laser Symposium at RRCAT, Indore from Dec.1-4, 2010.
  6. Measurement of the absolute fluorescence quantum yield of MEH-PPV solution using a dual-beam thermal lens technique, Sreelekha , G. Vidya, A. Santhi, K. Geetha, Rani Joseph ,S. Prathapan , P. Radhakrishnan, C.P.G. Vallabhan and V.P.N. Nampoori, Kerala Women’s Science Congress 2010, at St. Teresa’s College, Ernakulam on August 10- 12, 2010.
  7. Thickness effects on the fluorescence spectra of MEH:PPV/PMMA thin film waveguides, Geetha K, Sreelekha G , Vidya G,Rani M Joseph, C P G Vallabhan, P Radhakrishnan and V P N Nampoori.   Eighth DAE-BRNS National Laser Symposium-NLS-08 , January 7-10, 2009
  8. Side Illumination Fluorescence Technique for Loss Characterization of Dye Doped POF, M Rajesh, K Geetha, M Sheeba, C P G Vallabhan, P Radhakrishnan and V P N Nampoori, NLS-2005, Vellore Institute of Technology-Vellore, Tamilnadu, 2005.
  9. Side Illumination Fluorescence Technique for the characterization of optical loss in Dye doped planar waveguides, K Geetha, M. Rajesh, V. P. N. Nampoori, C.P.G. Vallabhan and P. Radhakrishnan, National Laser Symposium, Kharagpur, 2003.
  10. Side Illumination Fluorescence studies in dye doped polymer waveguide, K Geetha, Pramod Gopinath, K P Unnikrishnan, S Thomas Lee, V P N Nampoori, C P G Vallabhan and P Radhakrishnan, , Proceedings of National Laser Symposium 2001, Dec 19-21, CAT Indore, p141-142, 2001.

Book Chapter

  1. Geetha K , Fluorescent Copper Nanoparticles – Opportunities and Challenges, Recent Advances in Nanotechnology and Material Sciences, pp201-209, UGC-HRDC, University of Calicut, 2018.(ISBN 978-3-16-148410-0)
Projects

Co-investigator of UGC funded Minor Research Project on Synthesis of Inorganic Nano particles and Investigation of their size and Structure, 2014-2016

Membership in Academic Bodies/ Organisations
  • Life Member of Photonics Society of India (Membership No. 179)
  • Life Member of Academy of Physics Teachers (APT), Kerala (Membership No. APTLM 1090)
Courses & Training Attended
  • 77th Orientation Programme from  16/01/2013 to 12/02/2013, sponsored by UGC ASC, University of Calicut
  • 2nd Refresher course in Nanoscience (Multidisciplinary) from 17/09/2014 to 09/10/2014, sponsored by UGC ASC,  University of Calicut .
  • 3rd Refresher Course in Nanoscience from 29/11/2018 to 19/12/2018 sponsored by UGC HRDC, University of Calicut .
  • One week Short Run Course on E – Content Development from 26/08/19 to 01/09/2019 organised by MHRD –TLC under PMMMNMTT, Department of Education, University of Calicut.
  • Short Term Course on Soft Skills from 07/02/2020 to 13/02/2020, sponsored by UGC HRDC, University of Calicut.
  • Two weeks MOOC Course on Online Learning and Content Development from 18/04/2020 to 2/05/2020 organised by FLAIR Kerala and Directorate of Collegiate Education, Kerala.
  • One week Online Short Run Course on E-content Development and Course Design from 23/09/2020 to 29/09/2020 organised by MHRD-TLC, University of Calicut.

 

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