期刊
ACS NANO
卷 8, 期 10, 页码 10947-10952出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn504856g
关键词
perovskites; atomic layer deposition; whispering gallery mode lasing; CH3NH3PbI3
类别
资金
- King Abdullah University of Science and Technology (KAUST) [KUS-11-009-21]
- Ontario Research Fund Research Excellence Program
- Natural Sciences and Engineering Research Council (NSERC) of Canada
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 mu J 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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