中国物理B ›› 2024, Vol. 33 ›› Issue (12): 128103-128103.doi: 10.1088/1674-1056/ad8db5

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Chiral polaritons in semiconductor perovskite metasurface enhanced by bound states in the continuum

Dun Wang(汪顿)1, Albert Y. Xiong2, Julia Q. Zhang2, Zengde She(佘增德)1, Xiaofeng Kang(康晓峰)2, Ying Zhu(朱莹)2, Sanjib Ghosh3, and Qihua Xiong(熊启华)1,2,3,4,†   

  1. 1 State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China;
    2 Tsinghua International School, Beijing 100084, China;
    3 Beijing Academy of Quantum Information Sciences, Beijing 100193, China;
    4 Frontier Science Center for Quantum Information, Beijing 100084, China
  • 收稿日期:2024-09-27 修回日期:2024-10-30 接受日期:2024-11-01 出版日期:2024-12-15 发布日期:2024-11-29
  • 通讯作者: Qihua Xiong E-mail:qihua_xiong@tsinghua.edu.cn
  • 基金资助:
    Q. X. gratefully acknowledges the strong funding support from the National Key Research and Development Program of China (Grant No. 2022YFA1204700) and the National Natural Science Foundation of China (Grant Nos. 12020101003, 92056204, and 92250301). S. G. acknowledges the funding support from the National Natural Science Foundation of China (Grant No. 12274034).

Chiral polaritons in semiconductor perovskite metasurface enhanced by bound states in the continuum

Dun Wang(汪顿)1, Albert Y. Xiong2, Julia Q. Zhang2, Zengde She(佘增德)1, Xiaofeng Kang(康晓峰)2, Ying Zhu(朱莹)2, Sanjib Ghosh3, and Qihua Xiong(熊启华)1,2,3,4,†   

  1. 1 State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China;
    2 Tsinghua International School, Beijing 100084, China;
    3 Beijing Academy of Quantum Information Sciences, Beijing 100193, China;
    4 Frontier Science Center for Quantum Information, Beijing 100084, China
  • Received:2024-09-27 Revised:2024-10-30 Accepted:2024-11-01 Online:2024-12-15 Published:2024-11-29
  • Contact: Qihua Xiong E-mail:qihua_xiong@tsinghua.edu.cn
  • Supported by:
    Q. X. gratefully acknowledges the strong funding support from the National Key Research and Development Program of China (Grant No. 2022YFA1204700) and the National Natural Science Foundation of China (Grant Nos. 12020101003, 92056204, and 92250301). S. G. acknowledges the funding support from the National Natural Science Foundation of China (Grant No. 12274034).

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摘要： The exploration of novel chiral optical platforms holds both fundamental and practical importances, which have shown great promise towards applications in valleytronics, chiral sensing and nanoscopic chiroptics. In this work, we combine two key concepts—chiral bound states in the continuum and exciton polaritons - to showcase a strong chiral response from polaritons. Using the finite element method, we numerically design a CsPbBr$_{3}$ based metasurface that supports intrinsically chiral bound states in the continuum and verify the chirality by calculating the reflection spectrum and eigen-polarization mapping. We further demonstrate chirality-dependent exciton polariton angular dispersion arising from the strong coupling between the chiral BIC and excitons in CsPbBr$_{3}$ by simulating the polariton angle-resolved absorption spectrum. Reciprocity analysis reveals that the polariton photoluminescence in different momentum space locations is selectively enhanced by chiral pumping light. Our results suggest a promising first step towards chiral polaritonics.

关键词: bound states in the continuum, chirality, metasurface, perovskite microcavities, exciton polariton

Abstract: The exploration of novel chiral optical platforms holds both fundamental and practical importances, which have shown great promise towards applications in valleytronics, chiral sensing and nanoscopic chiroptics. In this work, we combine two key concepts—chiral bound states in the continuum and exciton polaritons - to showcase a strong chiral response from polaritons. Using the finite element method, we numerically design a CsPbBr$_{3}$ based metasurface that supports intrinsically chiral bound states in the continuum and verify the chirality by calculating the reflection spectrum and eigen-polarization mapping. We further demonstrate chirality-dependent exciton polariton angular dispersion arising from the strong coupling between the chiral BIC and excitons in CsPbBr$_{3}$ by simulating the polariton angle-resolved absorption spectrum. Reciprocity analysis reveals that the polariton photoluminescence in different momentum space locations is selectively enhanced by chiral pumping light. Our results suggest a promising first step towards chiral polaritonics.

Key words: bound states in the continuum, chirality, metasurface, perovskite microcavities, exciton polariton

中图分类号:  (Metamaterials for chiral, bianisotropic and other complex media)

  • 81.05.Xj
71.35.-y (Excitons and related phenomena) 71.36.+c (Polaritons (including photon-phonon and photon-magnon interactions)) 78.20.Bh (Theory, models, and numerical simulation)