A single-photon source based on topological bulk cavity

Xin-Rui Mao; Wei-Jie Ji; Shao-Lei Wang; Han-Qing Liu; Bang Wu; Xu-Jie Wang; Li Liu; Lai Zhou; Haiqiao Ni; Zhichuan Niu; Zhiliang Yuan

doi:10.1038/s41377-025-01929-4

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A single-photon source based on topological bulk cavity

Original Articles

- A single-photon source based on topological bulk cavity
- A single-photon source based on topological bulk cavity
- Light: Science & Applications 2025年14卷第10期页码：3131-3138
- Affiliations：
  
  1.Beijing Academy of Quantum Information Sciences, Beijing 100193, China
  2.National Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China
  3.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  4.State Key Laboratory of Optoelectronic Materials, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Author bio：
  
  Bang Wu (wubang@baqis.ac.cn)
- Funds：
- DOI：10.1038/s41377-025-01929-4
  中图分类号：
- 收稿：2025-01-17，
  
  修回：2025-06-17，
  
  录用：2025-06-20，
  
  网络出版：2025-08-28，
  
  纸质出版：2025-10-31
- Accepted：
Scan QR Code
Xin-Rui Mao, Wei-Jie Ji, Shao-Lei Wang, 等. A single-photon source based on topological bulk cavity[J]. Light: Science & Applications, 2025,14(10):3131-3138.

Mao, X. R. et al. A single-photon source based on topological bulk cavity. Light: Science & Applications, 14, 3131-3138 (2025).
Xin-Rui Mao, Wei-Jie Ji, Shao-Lei Wang, 等. A single-photon source based on topological bulk cavity[J]. Light: Science & Applications, 2025,14(10):3131-3138. DOI： 10.1038/s41377-025-01929-4.

Mao, X. R. et al. A single-photon source based on topological bulk cavity. Light: Science & Applications, 14, 3131-3138 (2025). DOI： 10.1038/s41377-025-01929-4.

摘要

Abstract

Topological photonics offers the potential to develop quantum light sources with inherent robustness against structural disorders. To date

topologically protected edge or corner states have been investigated for this purpose. Here

for the first time

we exploit a topological bulk state with vertical directionality to enhance the light emission from a single semiconductor quantum dot (QD). An irregular 'Q'-shaped cavity is applied for establishing topological robustness. We experimentally demonstrate a 1.6-fold Purcell enhancement of single-photon emission in the topological bulk cavity

with tolerance to the emission wavelength or the positioning of the coupled QD. Simulations indicate that such a QD-cavity coupling system can retain a Purcell factor exceeding 1.6 under a broad spectral detuning range of 8.6 nm or a coverage area of 2.5 μm

. Furthermore

the optimized cavity structure integrated with a reflector predicts a high single-photon extraction efficiency up to 92%. Our results offer a novel approach to develop topologically protected quantum light sources with high extraction efficiency and robust QD-cavity interaction against irregular cavity boundaries.

关键词

Keywords

references

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