| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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All-chalcogenide glass based high fill-factor long-wave infrared micro-metalens array with superior optical flexibility |
| Zhaofeng Gu(谷招峰)1,2,†, Kongsi Zhou(周孔思)1,2,†, Tong Sun(孙童)3, Yixiao Gao(高一骁)1,2, Yimin Chen(陈益敏)1,2, Zijun Liu(刘自军)1,2, Chenjie Gu(顾辰杰)1,2,3,‡, Pengfei Lu(芦鹏飞)3, and Xiang Shen(沈祥)1,2,§ |
1 Laboratory of Infrared Materials and Devices, Research Institute of Advanced Technologies, Ningbo University, Ningbo 315211, China;
2 Zhejiang Key Laboratory of Advanced Optical Functional Materials and Devices, Ningbo 315211, China;
3 Zhejiang Supermat Sen-Ray Optoelectronics Co., Ltd., Ningbo 315400, China |
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Abstract Long-wave infrared (LWIR) micro-metalens arrays have emerged as highly flexible and multifunctional optical elements, significantly enhancing the performance of infrared imaging systems. In this work, two types of chalcogenide glass based LWIR micro-metalens arrays with $10 \times 10$ array-size and 100% fill factor were designed and investigated. Specifically, the first one possesses a uniform focal length of 110 μm, and it can efficiently focus the incident light (9.78 μm) into a spot with a full width at half maximum (FWHM) of approximately 11.5 μm ($\sim 1.18\lambda $). Additionally, the second one features flexible and configurable focal lengths of the respective micro-metalenses in the array, and focal lengths of 102 μm, 149 μm, and 182 μm can be achieved on one substrate, while it still retains the same optical performance as the micro-metalens array with a single focal length. Overall, these all-chalcogenide glass based LWIR micro-metasurface arrays possess significant potential for integrating within advanced infrared imaging systems in the future.
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Received: 07 February 2025
Revised: 10 April 2025
Accepted manuscript online: 07 May 2025
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PACS:
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42.70.-a
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(Optical materials)
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42.82.Cr
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(Fabrication techniques; lithography, pattern transfer)
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95.75.De
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(Photography and photometry (including microlensing techniques))
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78.20.Bh
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(Theory, models, and numerical simulation)
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| Fund: Project supported by the Natural Science Foundation of Zhejiang Province (Grant Nos. LDT23F05015F05 and LDT23F05011F05) and the Joint Funds of the National Natural Science Foundation of China (Grant No. U24A20313). |
Corresponding Authors:
Chenjie Gu, Xiang Shen
E-mail: guchenjie@nbu.edu.cn;shenxiang@nbu.edu.cn
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Cite this article:
Zhaofeng Gu(谷招峰), Kongsi Zhou(周孔思), Tong Sun(孙童), Yixiao Gao(高一骁), Yimin Chen(陈益敏), Zijun Liu(刘自军), Chenjie Gu(顾辰杰), Pengfei Lu(芦鹏飞), and Xiang Shen(沈祥) All-chalcogenide glass based high fill-factor long-wave infrared micro-metalens array with superior optical flexibility 2025 Chin. Phys. B 34 074213
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