激光阈值
低语长廊波浪
材料科学
光学
光电子学
窃窃私语画廊
蚀刻(微加工)
光刻
硅
激光器
Q系数
谐振器
波长
增益开关
紫外线
物理
纳米技术
图层(电子)
作者
Gangyi Zhu,Jiaping Li,Jitao Li,Jiyuan Guo,Jun Dai,Chunxiang Xu,Yongjin Wang
出处
期刊:Optics Letters
[The Optical Society]
日期:2018-02-06
卷期号:43 (4): 647-647
被引量:36
摘要
We fabricated a floating GaN microdisk supported by a silicon pillar through photolithography, dry-etching GaN, and isotropic wet-etching silicon methods. Single-mode ultraviolet whispering gallery mode (WGM) lasing was obtained from the floating GaN microdisk under optical pumping conditions at room temperature. The features of WGM lasing, i.e., the threshold, emission intensity, and lasing mode number, were characterized. A two-dimensional finite-difference time-domain simulation about the optical field contour profile also confirmed the resonance mechanism of WGM lasing. This work can help realize single-mode WGM lasing with high quality factor and low threshold.
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