Optical Whispering Galleries in Various Geometries

The thesis i mostly a study of whispering gallery mode resonators with various edge shapes. Also there is an attempt to fabricate small crystalline resonators via diamond turning.

The simulation of whispering gallery modes are done with COMSOL 4.2 using its RF module. It is observed that the whispering gallery modes can be simulated using the 2D-axissymmetric model. Some effects of modes on the edge shape is studied. Plasmonic whispering gallery modes are also observed when the resonator is coated with a layer of metal. Some interesting phenomena are seen such as the existence of whispering galleries on negative curvatures and the localization of plasmonic modes on conical shapes. Such localization also results in a white light resonator.