Whispering gallery mode resonance transfer in hollow microcavities

摘要

We investigated the hollow whispering gallery mode (WGM) microcavity, in which the WGM resonance position is transferred when n(core) = n(wall) (referred to as a "jump point"). Via numerical simulation, we verified the WGM resonance trajectory from the wall to the core with changes in the core refractive index from n(core) n(wall) to n(core) n(wall). Owing to the transfer of the WGM resonance characteristics, the refractive-index sensitivity, Q value, and free spectral range of the WGM resonance differed markedly after the jump point. This study can be considered as a proof of concept and can be extended to higher-quality microspheres or microbubbles. (C) 2018 The Japan Society of Applied Physics