期刊
APPLIED PHYSICS LETTERS
卷 105, 期 15, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4898703
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资金
- DARPA
- Dow Chemical Company as part of the Flexible Electronics initiative
We report optically pumped random lasing in planar methylammonium lead iodide perovskite microcrystal networks that form spontaneously from spin coating. Low thresholds (<200 mu J/cm(2)) and narrow linewidths (Delta lambda < 0.5 nm) reflect lasing from closed quasi-modes that result from ballistic waveguiding in linear network segments linked by scattering at the junctions. Spatio-spectral imaging indicates that these quasi-modes extend over lateral length scales > 100 mu m and spatially overlap with one another, resulting in chaotic pulse-to-pulse intensity fluctuations due to gain competition. These results demonstrate this class of hybrid organic-inorganic perovskite as a platform to study random lasing with well-defined, low-level disorder, and support the potential of these materials for use in semiconductor laser applications. (C) 2014 AIP Publishing LLC.
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