Robust and Flexible Random Lasers Using Perovskite Quantum Dots Coated Nickel Foam for Speckle-Free Laser Imaging

Wei Gao, Ting Wang, Jiangtao Xu, Ping Zeng, Wenfei Zhang, Yunduo Yao, Changsheng Chen, Mingjie Li, Siu Fung Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

The advantage of using flexible metallic structures as the substrate of flexible lasers over plastic materials is its strong mechanical strength and high thermal conductivity. Here, it is proposed to deposit CsPbBr3 perovskite quantum dots onto Ni porous foam for the realization of flexible lasers. Under two-photon 800 nm excitation at room temperature, incoherent random lasing emission is observed at ≈537 nm. By external deformation of the Ni porous foam, incoherent random lasing can be tuned to amplified spontaneous emission as well as the corresponding lasing threshold be controlled. More importantly, it is demonstrated that the laser is robust to intensive bending (>1000 bending cycles) with minimum effect on the lasing intensity. This flexible laser is also shown to be an ideal light source to produce a “speckle” free micro-image.

Original languageEnglish
Article number2103065
JournalSmall
Volume17
Issue number39
DOIs
Publication statusPublished - 1 Oct 2021

Keywords

  • flexible lasers
  • incoherent random lasing
  • Ni porous foams
  • perovskite quantum dots
  • two-photon excitation

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

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