Conformal Organohalide Perovskites Enable Lasing on Spherical Resonators
Top Cited Papers
- 17 October 2014
- journal article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 8 (10), 10947-10952
- https://doi.org/10.1021/nn504856g
Abstract
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.Keywords
Funding Information
- Natural Sciences and Engineering Research Council of Canada
- King Abdullah University of Science and Technology (KUS-11-009-21)
- Ontario Research Fund
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