Structural characterization of thin-walled microbubble cavities  

作　　者：MOHAMMED ZIA JALALUDEEN SHILONG LI KE TIAN TOSHIO SASAKI SÍLE NIC CHORMAIC 

机构地区：[1]Light-Matter Interactions for Quantum Technologies Unit,Okinawa Institute of Science and Technology Graduate University,Onna,Okinawa 904-0495,Japan [2]College of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,China [3]Scientific Imaging Section,Okinawa Institute of Science and Technology Graduate University,Onna,Okinawa 904-0495,Japan

出　　处：《Photonics Research》2023年第8期I0021-I0027,共7页光子学研究（英文版）

基　　金：Japan Society for the Promotion of Science(JSPS)Grant-in-Aid for Scientific Research(C)(23K04617);Grant-in-Aid for Early-Career Scientists(22K14621)。

摘　　要：Whispering gallery mode(WGM)microbubble cavities are a versatile optofluidic sensing platform owing to their hollow core geometry.To increase the light–matter interaction and,thereby,achieve higher sensitivity,thinwalled microbubbles are desirable.However,a lack of knowledge about the precise geometry of hollow microbubbles prevents us from having an accurate theoretical model to describe the WGMs and their response to external stimuli.In this work,we provide a complete characterization of the wall structure of a microbubble and propose a theoretical model for the WGMs in this thin-walled microcavity based on the optical waveguide approach.Structural characterization of the wavelength-scale wall is enabled by focused ion beam milling and scanning electron microscopy imaging.The proposed theoretical model is verified by finite element method simulations.Our approach can readily be extended to other low-dimensional micro-/nanophotonic structures.

关 键 词：WAVEGUIDE characterization BUBBLE 

分 类 号：O43[机械工程—光学工程]