In:
Nanoscale Horizons, Royal Society of Chemistry (RSC), Vol. 8, No. 10 ( 2023), p. 1403-1410
Abstract:
All-inorganic cesium lead bromide (CsPbBr 3 ) quantum dots (QDs) with high photoluminescence (PL) quantum efficiency have been reported as ideal gain materials for high-performance lasers. Nevertheless, isolated CsPbBr 3 QDs have not achieved lasing emission (LE) due to finite absorption cross-section. Here, we demonstrate continuous-wave lasing of isolated CsPbBr 3 QDs embedded in a microcavity. Distributed Bragg reflectors (DBRs), together with isolated CsPbBr 3 QDs in a polymer matrix, are introduced to construct a vertical-cavity surface-emitting laser (VCSEL), which exhibits stable single-mode lasing emissions with an ultra-low threshold of 8.8 W cm −2 and a high Q factor of 1787. Such perovskite-based microcavity structures sustain highly stable excitons at room temperature and can provide an excellent experimental platform to further study the single-particle nano-lasers and quantum physics frontiers such as exciton–polariton condensation, single-photon emission, and optical quantum communication.
Type of Medium:
Online Resource
ISSN:
2055-6756
,
2055-6764
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
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