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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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Linearly polarized lasing based on coupled perovskite microspheres.

Beier Zhou1, Yichi Zhong, Mingming Jiang

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

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|February 13, 2020
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Summary

We enhanced microlaser polarization using the Vernier effect in perovskite microspheres, achieving high-quality, linearly polarized single-mode lasing. This breakthrough advances on-chip integrated photonics.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Microlaser polarization is crucial for high-quality laser beams but challenging to achieve in on-chip integrated photonic circuits.
  • Conventional polarization methods are unsuitable for integrated microlasers, which typically exhibit low polarization due to spontaneous emission.

Purpose of the Study:

  • To investigate the use of the Vernier effect for enhancing the polarization of microlasers.
  • To demonstrate linearly polarized single-mode lasing in metal halide perovskite microspheres.

Main Methods:

  • Utilized metal halide perovskite microspheres to demonstrate the Vernier effect for polarization enhancement.
  • Employed the finite element method to analyze mode distributions and coupled resonances.

Main Results:

  • Improved the degree of polarization from approximately 0.2 to 0.78.
  • Achieved linearly polarized single-mode lasing with a low threshold and high quality after coupling.
  • Obtained a clear physical diagram of coupled resonances.

Conclusions:

  • The Vernier effect effectively enhances microlaser polarization.
  • Coupled linearly polarized single-mode microlasers are a significant step towards integrated photonic platforms.