激光阈值
有源激光介质
光电子学
材料科学
纳秒
受激发射
半导体
放大自发辐射
钙钛矿(结构)
激光器
净收益
谐振器
低语长廊波浪
光学
物理
化学
激光功率缩放
CMOS芯片
结晶学
波长
放大器
作者
Brandon R. Sutherland,Sjoerd Hoogland,Michael M. Adachi,Christopher Y. S. Wong,Edward H. Sargent
出处
期刊:ACS Nano
[American Chemical Society]
日期:2014-10-17
卷期号:8 (10): 10947-10952
被引量:348
摘要
Conformal integration of semiconductor gain media is broadly important in on-chip optical communication technology. Here we deploy atomic layer deposition to create conformally deposited organohalide perovskites--an attractive semiconducting gain medium--with the goal of achieving coherent light emission on spherical optical cavities. We demonstrate the high quality of perovskite gain media fabricated with this method, achieving optical gain in the nanosecond pulse regime with a threshold for amplified spontaneous emission of 65 ± 8 μJ cm(-2). Through variable stripe length measurements, we report a net modal gain of 125 ± 22 cm(-1) and a gain bandwidth of 50 ± 14 meV. Leveraging the high quality of the gain medium, we conformally coat silica microspheres with perovskite to form whispering gallery mode optical cavities and achieve lasing.
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