通过优化表面钝化实现单量子点的确定性共振荧光增强

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

作者信息

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

机构信息

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.

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.

出版信息

Light Sci Appl. 2025 Apr 22;14(1):170. doi: 10.1038/s41377-025-01838-6.

DOI:10.1038/s41377-025-01838-6

PMID:40263252

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12015415/

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.

摘要

表面态引起的退化限制了近表面半导体量子点（QD）的性能。在此，我们通过逐点比较展示了优化的钝化技术，以改善共振荧光（RF）。这些优化技术首次降低了现有脉冲RF信号的线宽和噪声水平，并恢复了原本正在消失的脉冲RF信号。通过光学和表面科学表征证实，这些改进源于钝化后表面态密度和电场的降低。我们的研究推动了钝化技术在薄膜量子器件中的应用，为基于量子点的最佳量子光源的进一步发展铺平了道路。