Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources

Jiawei Yang; Yan Chen; Zhixuan Rao; Ziyang Zheng; Changkun Song; Yujie Chen; Kaili Xiong; Pingxing Chen; Chaofan Zhang; Wei Wu; Ying Yu; Siyuan Yu

doi:10.1038/s41377-024-01384-7

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Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources

Original Articles

- Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources
- Light: Science & Applications Vol. 13, Issue 2, Pages: 325-332(2024)
- Affiliations：
  
  1.State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou 510006, China
  2.Institute for Quantum Science and Technology, College of Science, National University of Defense Technology, Changsha 410073, China
  3.College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
  4.Hunan Key Laboratory of Quantum Information Mechanism and Technology, National University of Defense Technology, Changsha, 410073 Hunan, China
  5.Hefei National Laboratory, Hefei 230088, China
- Author bio：
  
  Ying Yu (yuying26@mail.sysu.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01384-7
  CLC：
- Received：13 September 2023，
  
  Revised：05 January 2024，
  
  Accepted：2024-01-15，
  
  Published Online：30 January 2024，
  
  Published：29 February 2024
- Accepted：
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Yang, J. W. et al. Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources. Light: Science & Applications, 13, 325-332 (2024).
DOI：

Yang, J. W. et al. Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources. Light: Science & Applications, 13, 325-332 (2024). DOI： 10.1038/s41377-024-01384-7.

摘要

Abstract

Cavity-enhanced single quantum dots (QDs) are the main approach towards ultra-high-performance solid-state quantum light sources for scalable photonic quantum technologies. Nevertheless

harnessing the Purcell effect requires precise spectral and spatial alignment of the QDs' emission with the cavity mode

which is challenging for most cavities. Here we have successfully integrated miniaturized Fabry-Perot microcavities with a piezoelectric actuator

and demonstrated a bright single-photon source derived from a deterministically coupled QD within this microcavity. Leveraging the cavity-membrane structures

we have achieved large spectral tunability via strain tuning. On resonance

a high Purcell factor of ~9 is attained. The source delivers single photons with simultaneous high extraction efficiency of 0.58

high purity of 0.956(2) and high indistinguishability of 0.922(4). Together with its compact footprint

our scheme facilitates the scalable integration of indistinguishable quantum light sources on-chip

therefore removing a major barrier to the development of solid-state quantum information platforms based on QDs.

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references

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