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Related Experiment Video

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Chiral Exciton-Polariton Continuous-Wave Perovskite Laser.

Bangjie Song1,2, Ping Bai2, Zhenqin Li2

  • 1Zhejiang University, Hangzhou, Zhejiang, China.

Advanced Materials (Deerfield Beach, Fla.)
|January 14, 2026
PubMed
Summary

Researchers developed a room-temperature chiral exciton-polariton laser using 2D perovskites. This breakthrough enables efficient, circularly polarized laser emission for advanced spin-photonics applications.

Keywords:
chiralitycontinuous‐waveexciton‐polaritonhalide perovskiteslasing

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Area of Science:

  • Optoelectronics
  • Materials Science
  • Photonics

Background:

  • Chiral optical materials are key for spin-selective photonics.
  • Achieving continuous-wave (CW) circularly polarized lasing at room temperature remains a significant challenge.

Purpose of the Study:

  • To demonstrate a room-temperature CW chiral exciton-polariton laser.
  • To utilize a microcavity strongly coupled with chiral 2D perovskite, (MBA)2PbI4.

Main Methods:

  • Fabrication of a microcavity strongly coupled with chiral 2D perovskite, (MBA)2PbI4.
  • Characterization of exciton-polariton lasing under continuous-wave pumping.
  • Analysis of laser emission properties, including circular polarization and spectral tunability.

Main Results:

  • Achieved ultralow threshold CW lasing at room temperature with an onset pump intensity of 0.5 W·cm⁻².
  • Demonstrated intrinsically circularly polarized laser emission with a luminescence dissymmetry factor (g_lum) of approximately 0.30.
  • Showcased spectral tunability by adjusting cavity thickness and excellent device stability over hours of CW operation.

Conclusions:

  • The developed chiral polariton laser offers a novel route for efficient room-temperature circularly polarized laser emission.
  • The device serves as a versatile platform for spin-optoelectronic applications and exploring spin-polarized quantum fluids of light.