A fiber taper can evanescently couple to whispering gallery modes (WGMs) in a planar silica microdisk for observing the optical properties of the microdisk cavity.
The single-mode conditions of the SOI-based rib waveguide is first analyzed, and applied to the whispering gallery modes embedded circular octagonal resonator filter.
I consider slow propagation of whispering gallery modes along the fibre surface.
