Metal substrate modulation for realizing a more compact whispering-gallery microcavity. (24th May 2021)

• Record Type: Journal Article
• Authors: Yu, Jiaxin; Yang, Liquan; Gu, Fuxing
• Is Part Of: Applied physics express. Volume 14:Number 6(2021)
• Publication Date: 2021-05-24
• Subjects: Whispering gallery mode -- Compact laser -- Microcavity; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.35848/1882-0786/ac0084
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: The compact cavity is always conducive to the integration and application of the devices based on whispering gallery modes. However, it is a challenge to strike a balance between the pursuit of a smaller cavity and higher quality. Here, we propose a low-loss cavity by combining a microsphere with a metal substrate, thereby compressing the cavity size by 24%. In addition, the substrate-modulated cavity is found to have a higher confinement factor and Purcell factor, showing the good prospect for realizing high-performance compact lasers.