Square microcavity semiconductor lasers

• 来源期刊: 中国物理B（英文版）
• 关键词: square microcavity whispering-gallery modes semiconductor lasers
• 年，卷（期）: 2018,（11）
• 页码范围: 176-185
• 页数: 10页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/11/114212

摘要

Square microcavities,which support whispering-gallery modes with total internal reflections,can be employed as high-quality laser resonators for fabricating compact,low-threshold semiconductor lasers.In this paper,we review the recent progress of square microcavity semiconductor lasers.The characteristics of confined optical modes in the square microcavities are introduced briefly.Based on the mode properties of the square microcavities,dual-mode lasers with tunable wavelength intervals are realized for generating microwave signals.Furthermore,deformed square microcavity lasers with the sidewalls replaced by circular sides are proposed and experimentally demonstrated to enhance the mode confinement and increase the dual-mode interval to the THz range.In order to further reduce the device size,metal-confined wavelength-scale square cavity lasers are also demonstrated.