Photonic materials

Display device materials: Laser Spectroscopy, Photonics & Nonlinear optics, Glassy materials, phosphor materials 

The activities in this group include synthesis and characterization of luminescent materials for lighting, display and security applications.  Two types of systems have so far been investigated.  In the first class, Ferroelectric Strontium Barium Niobate fine ceramic systems doped with different rare-earth ions were prepared and investigated for their structural and optical properties. We are also successful in sol-gel synthesis of different compositions of these materials in the nano-regime.  The other group of phosphor material investigated belongs to Sr 2 CeO 4 , a recently reported blue phosphor by the combinatorial materials synthesis technique.Currently, we are investigating the effect of different rare-earth ions on the structural and optical properties of this interesting group of materials.  These materials have been prepared in the nano regime using sol-gel synthesis using different chemical routes. The thin film preparation and characterization of these systems are in progress. The group has also synthesized Cd x Zn 1-x S quantum dot alloys through chemical method and investigated the luminescent and optical limiting properties.

Members of the group

	Twinkle Anna Jose  (Research Scholar : Phosphor materials for photonic applications )
	Beryl C (Research Scholar)
	Jeena Rose Jose (Research Scholar)
	Arya Gopinath (Research Scholar)
	Sincy Anna Oommen (Research Scholar)
	Amogh M S (Research Scholar)
	Ashikha J Ashok (Research Scholar)

Associations/Collaborations

1. Prof. Reji Philip, Raman Research Institute, Bangalore, India

Alumni 

1. Dr. Viji Vidyadharan
2. Dr. Subash Gopi 
3. Dr. Sreeja E
4. Dr. Saritha K Jose 
5. Dr. Remya Mohan P 
6. Dr. Adon Jose 
7. Dr. Krishnapriya T
8. Dr. Anns George 

Selected Publications

1. SPR coupled luminescence enhancement of Er3+/Au NPs-doped multicomponent tellurite glassesMS Sajna, MS Sanu, G Vimal, VP Prakashan, PR Biju, C Joseph, …Optical Materials 131, (2022) 112637
2. Tunable multicolor luminescence and energy transfer mechanism in Eu3+/Dy3+ co-doped Ca2Sb2O7 phosphor under UV excitation A George, SK Jose, A Jose, C Joseph, PR Biju Optics & Laser Technology 151,  (2022) 108029
3. Upconversion photoluminescence and radiative properties of Ba2CaWO6: Er3+ phosphors for photonic applications E Sreeja, A Jose, A George, NV Unnikrishnan, C Joseph, PR Biju Infrared Physics & Technology 123,  (2022) 104184
4. Role of energy transfer on the luminescent performance of UV light driven Er3+/Dy3+ co-activated fluoroborosilicate glasses A Jose, T Krishnapriya, E Sreeja, JR Jose, C Joseph, PR Biju Vacuum 199,  (2021) 110927
5. Color tunable luminescence characteristics and energy transfer analysis of Dy3+/Sm3+ co-doped multicomponent borosilicate glasses A Jose, T Krishnapriya, TA Jose, C Joseph, NV Unnikrishnan, PR Biju
   Scripta Materialia 203, (2021) 114088
6. Synthesis and luminescence characterization of Pr 3+ doped Sr 1.5 Ca 0.5 SiO 4 phosphor.Viji Vidyadharan, Kamal P. Mani, M.S. Sajna, Cyriac Joseph, N.V. Unnikrishnan,P.R. Biju. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 133 (2014) 767–772
7. Synthesis and luminescence characterization of Sr 0.5 Ca 0.5 TiO 3 :Sm 3+ phosphor.Viji Vidyadharan, Mohan P. Remya, Subhash Gopi, Sunil Thomas, Cyriac Joseph,N.V. Unnikrishnan, P.R. Biju. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 150 (2015) 419–429
8. Spectroscopic and photoluminescence characterization of Dy 3+ in Sr 0.5 Ca 0.5 TiO 3 phosphor. Viji Vidyadharan, E. Sreeja, Saritha K. Jose, Cyriac Joseph, N. V. Unnikrishnan,P. R. Biju. Luminescence: Journal of Biological and Chemical Luminescence 31 (2015) 202–209
9. Structural, optical and AC electrical properties of Ce 3+ -doped TiO 2 –SiO 2 matrices.Viji Vidyadharan, Prathibha Vasudevan, S. Karthika, Cyriac Joseph, N.V Unnikrishnan, P.R.Biju. Journal of Electronic Materials, Vol. 44, No. 8, (2015)
10. Luminescent characteristics of UV excited Sr 0.5 Ca 0.5 TiO 3 :Pr 3+ reddish orange phosphor.Viji Vidyadharan, Remya Mohan P, Cyriac Joseph, N.V. Unnikrishnan, P.R. Biju.Materials Chemistry and Physics 170 (2016) 38-43
11. Structural and optical characterization of Eu 3+ doped polymer-zirconia composites.Saritha K. Jose, Subash Gopi, Sanu Mathew Simon, Remya Mohan P., Cyriac Joseph, N.V.Unnikrishnan, P.R. Biju. Journal of Non-Crystalline Solids 452 (2016) 245–252
12. Judd–Ofelt analysis of Pr 3+ ions in Sr 1.5 Ca 0.5 SiO 4 and Sr 0.5 Ca 0.5 TiO 3 host matrices.Viji Vidyadharan, Subash Gopi, Remya Mohan P, Vinoy Thomas, Cyriac Joseph,N.V. Unnikrishnan, P.R. Biju. Optical Materials 51 (2016) 62–69
13. Dielectric properties of Sr 0.5 Ca 0.5 TiO 3 :xPr 3+ ceramics. Viji Vidyadharan, E. Sreeja, Santhosh Kumar A, Cyriac Joseph, N.V. Unnikrishnan,P.R. Biju. Ceramic International 43 (2017) 6268-6275.
14. Synthesis and luminescence characteristics of CaB 2 O 4 :Er 3+ ,Li + phosphor. Remya Mohan P, Subash Gopi, Viji Vidyadharan, Anns George, Cyriac Joseph,N.V. Unnikrishnan, P.R. Biju. Journal of Luminescence 187 (2017) 113–120
15. Judd–Ofelt analysis, structural and spectroscopic properties of sol–gel derived LaNbO 4 :Dy 3+ phosphors. P. Remya Mohan, Viji Vidyadharan, E. Sreeja, Cyriac Joseph, N. V. Unnikrishnan,P.R. Biju. Journal of Materials Science: Materials in Electronics 28 (2017)10250–10261