Stable continuous-wave lasing from discrete cesium lead bromide quantum dots embedded in a microcavity

Hongbo Zhang, Wen Wen, Bowen Du, Lei Zhou, Yu Chen, Shun Feng, Chenji Zou, Lishu Wu, Hong Jin Fan, Weibo Gao, Handong Sun, Jingzhi Shang, Ting Yu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

All-inorganic cesium lead bromide (CsPbBr3) quantum dots (QDs) with high photoluminescence (PL) quantum efficiency have been reported as ideal gain materials for high-performance lasers. Nevertheless, isolated CsPbBr3 QDs have not achieved lasing emission (LE) due to finite absorption cross-section. Here, we demonstrate continuous-wave lasing of isolated CsPbBr3 QDs embedded in a microcavity. Distributed Bragg reflectors (DBRs), together with isolated CsPbBr3 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.
Original languageEnglish
Pages (from-to)1403-1410
Number of pages8
JournalNanoscale Horizons
Volume8
Issue number10
Early online date14 Jul 2023
DOIs
Publication statusPublished - 1 Oct 2023

Keywords

  • General Materials Science

ASJC Scopus subject areas

  • Materials Science(all)

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