Open AccessWhispering gallery mode resonance excitations on a partially gold coated bottle microresonator
Author(s) -
Mohammad Nasir,
Ganapathy Senthil Murugan,
M.N. Zervas
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2075/1/012019
Subject(s) - whispering gallery wave , materials science , optics , resonance (particle physics) , excited state , curvature , coupling (piping) , meniscus , polarization (electrochemistry) , mode coupling , bottle , optoelectronics , atomic physics , physics , composite material , chemistry , geometry , mathematics , incidence (geometry) , resonator
The study on the excitations of whispering gallery mode (WGM) resonances optical bottle microresonator (BMR) partially coated with a thin gold Au metal film is presented. The BMR was fabricated through “soften-and-compress” technique on a small section of standard optical fibre. Depositing Au particles on the spheroidal curvature of the BMR surface yields a thin metal-film of a meniscus profile with 200 nm maximum gold thickness and tapered edges. A polarization resolved experimental setup was used to excite TE- and TM-mode resonances. Coupling strengths of the excited WGMs would vary with different coupling arrangements relative to the position of the meniscus Au film. Calculated Q -factor values of composite TE and TM mode resonances were determined to be in the range 1800 and 2700, respectively.