材料科学
分布式布拉格反射镜
激光阈值
光学
光电子学
激光器
电流密度
垂直腔面发射激光器
光圈(计算机存储器)
分布布拉格反射激光器
纵向模式
半导体激光器理论
半导体
物理
声学
量子力学
作者
Nathan Palmquist,Ryan M. Anderson,Jared A. Kearns,Joonho Back,Emily Trageser,Stephen H. Gee,Steven P. DenBaars,Shuji Nakamura
出处
期刊:Photonics
[MDPI AG]
日期:2023-06-03
卷期号:10 (6): 646-646
被引量:3
标识
DOI:10.3390/photonics10060646
摘要
We report long-cavity (60.5 λ) GaN-based vertical-cavity surface-emitting lasers with a topside monolithic GaN concave mirror, a buried tunnel junction current aperture, and a bottomside nanoporous GaN distributed Bragg reflector. Under pulsed operation, a VCSEL with a 9 µm aperture had a threshold current density of 6.6 kA/cm2, a differential efficiency of 0.7%, and a maximum output power of 290 µW for a lasing mode at 411 nm and a divergence angle of 8.4°. Under CW operation, the threshold current density increased to 7.3 kA/cm2, the differential efficiency decreased to 0.4%, and a peak output power of 130 µW was reached at a current density of 23 kA/cm2.
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