Deterministic resonance fluorescence improvement of single quantum dots by optimized surface passivation

Junyi Zhao; Runze Liu; Gengyan Zou; Zhenxuan Ge; Qihang Zhang; Yukun Qiao; Xing Ding; Guoqiu Jiang; Yiyang Lou; Yongpeng Guo; Tunghsun Chung; Yuming He; Chaoyang Lu; Yongheng Huo; Jianwei Pan

doi:10.1038/s41377-025-01838-6

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Deterministic resonance fluorescence improvement of single quantum dots by optimized surface passivation

Original Articles

- Deterministic resonance fluorescence improvement of single quantum dots by optimized surface passivation
- Light: Science & Applications Vol. 14, Issue 6, Pages: 1711-1717(2025)
- Affiliations：
  
  1.Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
  2.Shanghai Research Center for Quantum Science and CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China
  3.Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
  4.Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
- Author bio：
  
  Yuming He (yuminghe@mail.ustc.edu.cn)
  Yongheng Huo (yongheng@ustc.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-01838-6
  CLC：
- Received：05 January 2025，
  
  Revised：18 March 2025，
  
  Accepted：19 March 2025，
  
  Published Online：22 April 2025，
  
  Published：30 June 2025
- Accepted：
Scan QR Code
Zhao, J. Y. et al. Deterministic resonance fluorescence improvement of single quantum dots by optimized surface passivation. Light: Science & Applications, 14, 1711-1717 (2025).
DOI：

Zhao, J. Y. et al. Deterministic resonance fluorescence improvement of single quantum dots by optimized surface passivation. Light: Science & Applications, 14, 1711-1717 (2025). DOI： 10.1038/s41377-025-01838-6.

摘要

Abstract

The degradation caused by surface states restricts the performance of near-surface semiconductor quantum dots (QDs). Here

we demonstrate optimized passivation techniques to improve the resonance fluorescence (RF) with dot-to-dot comparisons. These optimized techniques

for the first time

reduce the linewidth and noise level of existing pulsed-RF signals

as well as revive pulsed-RF signals which originally are vanishing. The improvements are confirmed to originate from reduced surface state density and electric field after passivation

through optical and surface science characterizations. Our study promotes applications of the passivation techniques in thin-film quantum devices

paving the way for the further development of optimal QD-based quantum light sources.

关键词

Keywords

references

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