Work

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

Year: 2025

Type: article

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.

Source: Light Science & Applications

DOI: 10.1038/s41377-025-01838-6

Authors: 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

Institutions: University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale, Shanghai Research Center for Quantum Sciences, Chinese University of Hong Kong

Language: English

Topic: Semiconductor Quantum Structures and Devices

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $4,190

OpenAlex ID: W4409682262

FWCI: 3.334

Cites: 40

Cited by: 9

Related to: 10