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Related Experiment Video

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Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
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Single-Mode Lasers Based on Cesium Lead Halide Perovskite Submicron Spheres.

Bing Tang1,2, Hongxing Dong1, Liaoxin Sun3

  • 1Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences , Shanghai 201800, China.

ACS Nano
|October 10, 2017
PubMed
Summary

Researchers developed a room-temperature single-mode laser using cesium lead halide perovskite submicron spheres. These highly efficient, tunable lasers offer a new path for miniaturized photonic devices.

Keywords:
cesium lead halidemicrospheresingle-mode laserwavelength tunablewhispering gallery mode

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Cesium lead halide (CsPbX3) perovskites are promising materials for optoelectronic applications.
  • Fabricating stable, high-quality perovskite microcavities is crucial for advanced laser development.

Purpose of the Study:

  • To demonstrate a single-mode laser in cesium lead halide perovskite submicron spheres.
  • To achieve high performance metrics including low threshold, narrow linewidth, and high quality factor.
  • To explore wavelength tunability by controlling material composition and sphere size.

Main Methods:

  • Fabrication of all-inorganic CsPbX3 microspheres (0.2-10 μm) using a dual-source chemical vapor deposition method.
  • Utilizing whispering gallery resonant modes within the spherical cavities for laser operation.
  • Characterizing laser performance, including threshold, linewidth, and quality factor.

Main Results:

  • Achieved a single-mode laser operation in CsPbX3 submicron spheres at room temperature.
  • Obtained a very narrow linewidth (∼0.09 nm), low threshold (∼0.42 μJ cm⁻²), and high cavity quality factor (∼6100).
  • Demonstrated continuous wavelength tuning from 425 nm to 715 nm by adjusting halide composition and sphere size.

Conclusions:

  • The synthesized CsPbX3 microspheres enable highly efficient, tunable single-mode lasers.
  • Whispering gallery modes in these perovskite microcavities lead to superior laser performance.
  • This work presents a viable method for creating widely tunable and miniaturized single-mode lasers.