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Related Experiment Video

Updated: May 12, 2026

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
08:12

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Color-Tunable Lead Halide Perovskite Single-Mode Chiral Microlasers with Exceptionally High glum.

Haotian Gu1, Haoyuan Xu1, Chao Yang2

  • 1Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Material, School of Physics, South China Normal University, Guangzhou 510006, China.

Nano Letters
|October 3, 2024
PubMed
Summary

Researchers developed stable, tunable chiral microlasers using perovskite microrods and liquid crystals. These devices achieve high dissymmetry factors for circularly polarized light, advancing optoelectronics and quantum information processing.

Keywords:
Chiral lasingColor-tunablePerovskite microrodsSingle modeWGM microcavity

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Photonics

Background:

  • Chiral microlasers are crucial for advanced optoelectronics and quantum information processing.
  • Achieving high dissymmetry factors in chiral lasing with perovskite emitters has been a significant challenge.

Purpose of the Study:

  • To demonstrate stable, tunable chiral single-mode microlasers with high dissymmetry factors.
  • To explore the use of perovskite microrods and cholesteric liquid crystals for chiral lasing.

Main Methods:

  • Fabrication of CsPbClxBr3-x perovskite microrods (MRs).
  • Integration of MRs with cholesteric liquid crystal (CLC) layers to form chiral microcavities.
  • Characterization of lasing properties, including emission spectra and dissymmetry factors.

Main Results:

  • Demonstrated stable, single-mode chiral microlasers with tunable emission across the visible spectrum.
  • Achieved high circular polarization dissymmetry factors (g_lum) up to 1.62.
  • Showcased wavelength tunability by adjusting halide composition and CLC photonic bandgap.

Conclusions:

  • The combined perovskite MR and CLC approach provides a facile method for generating high-performance chiral lasers.
  • This technique is applicable to various semiconductor nanomaterials and holds potential for nanoscale photonic device integration.