Plasmonics Microbottle Resonator of Meniscus Gold

Abstract

Optical cavity supporting enhanced surface plasmon polariton (SPP) is demonstrated with the incorporation of a high-Q whispering-gallery mode (WGM) microbottle resonator (MBR). The thin gold metal-film deposited on the MBR only covers half of the resonator surface with a meniscus profile and maximum thickness of 200 nm. Composite TE (TM) Q-factor value in the range of 1900 (2000) was calculated with highly discriminated polarized light coupled into the hybrid microcavity.