In situ three-dimensional strain engineering of solid-state quantum emitters in photonic structures towards scalable quantum networks

Yan Chen (), Xueshi Li, Shunfa Liu, Jiawei Yang, Yuming Wei, Kaili Xiong, Yangpeng Wang, Jiawei Wang, Pingxing Chen, Xiao Li, Chaofan Zhang, Ying Yu, Tian Jiang () and Jin Liu ()
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Yan Chen: National University of Defense Technology
Xueshi Li: National University of Defense Technology
Shunfa Liu: Sun Yat-sen University
Jiawei Yang: Sun Yat-sen University
Yuming Wei: Jinan University
Kaili Xiong: National University of Defense Technology
Yangpeng Wang: Sun Yat-sen University
Jiawei Wang: Harbin Institute of Technology
Pingxing Chen: National University of Defense Technology
Xiao Li: National University of Defense Technology
Chaofan Zhang: National University of Defense Technology
Ying Yu: Sun Yat-sen University
Tian Jiang: National University of Defense Technology
Jin Liu: Sun Yat-sen University

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract Solid-state quantum emitters are pivotal for modern photonic quantum technology, yet their inherent spectral inhomogeneity imposes a critical challenge in pursuing scalable quantum network. Here, we develop a cryogenic-compatible strain-engineering platform based on a polydimethylsiloxane (PDMS) stamp, which we show can also work properly at cryogenic temperature. In-situ three-dimensional (3D) strain control is achieved for quantum dots (QDs) embedded in photonic nanostructures. The compliant PDMS enables independent tuning of emission energy and strong reduction of fine structure splitting (FSS) of single QDs, as demonstrated by a 7 meV spectral shift with a near-vanishing FSS in circular Bragg resonators and an unprecedented 15 meV tuning range in the micropillar. The PDMS-based 3D strain-engineering platform, compatible with diverse photonic structures at cryogenic temperature, provides a powerful and versatile tool for exploring fundamental strain-related physics and advancing integrated photonic quantum technology.

Date: 2025
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DOI: 10.1038/s41467-025-60403-2

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