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- Title
How lasing happens in CsPbBr<sub>3</sub> perovskite nanowires.
- Authors
Schlaus, Andrew P.; Spencer, Michael S.; Miyata, Kiyoshi; Liu, Fang; Wang, Xiaoxia; Datta, Ipshita; Lipson, Michal; Pan, Anlian; Zhu, X.-Y.
- Abstract
Lead halide perovskites are emerging as an excellent material platform for optoelectronic processes. There have been extensive discussions on lasing, polariton formation, and nonlinear processes in this material system, but the underlying mechanism remains unknown. Here we probe lasing from CsPbBr3 perovskite nanowires with picosecond (ps) time resolution and show that lasing originates from stimulated emission of an electron-hole plasma. We observe an anomalous blue-shifting of the lasing gain profile with time up to 25 ps, and assign this as a signature for lasing involving plasmon emission. The time domain view provides an ultra-sensitive probe of many-body physics which was obscured in previous time-integrated measurements of lasing from lead halide perovskite nanowires. Lead-halide perovskite are an interesting material platform for light-emitting devices but the underlying lasing mechanism is still disputed. Here, Schlaus et al. use time-resolved spectroscopy of CsPbBr3 nanowires to show that lasing results from stimulated emission of an electron-hole plasma.
- Publication
Nature Communications, 2019, Vol 10, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-018-07972-7