High-resolution and Tunable Red Indium Phosphide Quantum Dot Microlaser Arrays

doi:10.1007/s40242-025-5147-0

Chemical Research in Chinese Universities ›› 2025, Vol. 41 ›› Issue (5): 1234-1238.doi: 10.1007/s40242-025-5147-0

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High-resolution and Tunable Red Indium Phosphide Quantum Dot Microlaser Arrays

HE Ke^1,3, LI Hui², GUO Ning^1,3, WU Yuchen^1,3

1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
2. Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, P. R. China;
3. School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received:2025-07-14 Accepted:2025-08-09 Online:2025-10-01 Published:2025-09-26
Contact: LI Hui, E-mail: lihui-t22031@ustc.edu.cn;WU Yuchen, E-mail: wuyuchen@iccas.ac.cn E-mail:lihui-t22031@ustc.edu.cn;wuyuchen@iccas.ac.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (No. 52272052) and the Project of the National Key Research and Development Program of China (No. 2022YFA1207600).

Abstract

Abstract: Quantum dot (QD) lasers exhibit exceptional promise in optical communication, laser display, and biomedical diagnostic applications. However, the toxicity of heavy metals in II-VI QDs has impeded their broader deployment. Herein, red-emitting InP QDs bearing a gradient ZnSeS alloy shell were synthesized to suppress Auger recombination and thereby attain a lasing threshold as low as 32.1 μJ/cm². A capillary-bridge confined self-assembly method was employed to arrange these InP QDs into high-density micro-ring resonator arrays with resolutions exceeding 1000 ppi (ppi: proton pump inhibitor). Systematic variation of the microring diameter enabled modulation of the lasing mode structure, and single-mode lasing was realized in 6 μm rings under defined pumping conditions. This work establishes a heavy-metal- free platform for scalable, high-resolution quantum dot laser arrays.

Key words: Core/shell quantum dot, ZnSeS interlayer, Quantum dot laser, Confined assembly

HE Ke, LI Hui, GUO Ning, WU Yuchen. High-resolution and Tunable Red Indium Phosphide Quantum Dot Microlaser Arrays[J]. Chemical Research in Chinese Universities, 2025, 41(5): 1234-1238.

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High-resolution and Tunable Red Indium Phosphide Quantum Dot Microlaser Arrays

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