Research Guide: Dr. Saritha A C
- Thin films
- Optical micro-resonators
The group is primarily involved in thin film deposition and nanostructure synthesis of various materials and optimization of their structural, electrical, and optical properties for probable nanophotonic and optoelectronic applications. Both physical and chemical methods are used in the laboratory for producing thin films and nanostructures. Their properties are then tuned by adjusting the experimental parameters for making them apt for fabricating devices that interact with ultraviolet, visible, and infrared regions of the electromagnetic spectrum. At present, some of the materials of interest are metals, metal oxides, and metal sulfides.
Recently the group has started research on passive and active whispering gallery mode (WGM) microresonators for micro-lasing and optical frequency comb applications. In a microresonator, light is trapped inside by total internal reflection at the interface between the microstructure and the surrounding medium. Resonance condition is fulfilled if light reaches the original point with the same phase after one circulation. These resonances are referred to as whispering gallery modes. The high Q-value and low mode volume of WGM resonators are suitable for fabricating microlasers and optical frequency combs.