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The 5-THz metal-mesh filters based on Mylar film |
| Qiang Zhi(支强)1,2, Jiameng Wang(王家萌)1,2, Wei Geng(耿伟)1,2, Yuhao Hu(胡雨浩)1,2, Hao Wu(吴昊)1,2, Kangmin Zhou(周康敏)1, Jiangqiao Ding(丁江乔)1, Jie Hu(胡洁)1, Zheng Wang(王争)1, Wei Miao(缪巍)1, Jing Li(李婧)1, and Shengcai Shi(史生才)1,† |
1 Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China;
2 School of Astronomy and Space Sciences, University of Science and Technology of China, Hefei 230026, China |
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Abstract Imaging detector arrays have been widely used in terahertz (THz) astronomical observations, where optical filters play an important role. In this work, a 5-THz metal-mesh bandpass filter (MMBF) using cross-slot-shaped resonators is developed and fabricated on Mylar film through photolithography. Extensive simulations, accounting for factors such as Mylar film loss, surface conductivity, corner errors, and surface roughness, were conducted to assess their impact on the filter's performance. The measured characteristics, including a center frequency of 5.06 THz, a transmittance of 62%, and a 3-dB fractional bandwidth (FBW) is 38%, obtained via Fourier-transform infrared spectroscopy (FTIR), closely match the simulation results. This scalable metal-mesh filter shows promise for future THz astronomical applications
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Received: 12 March 2025
Revised: 18 April 2025
Accepted manuscript online: 22 May 2025
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PACS:
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84.30.Vn
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(Filters)
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85.25.Pb
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(Superconducting infrared, submillimeter and millimeter wave detectors)
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87.50.U-
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07.57.-c
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(Infrared, submillimeter wave, microwave and radiowave instruments and equipment)
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| Fund: Project supported in part by the National Key Research and Development Program of China (Grant No. 2023YFA1608200), the National Natural Science Foundation of China (Grant No. 12020101002), and the Fund from the Chinese Academy of Sciences (Grant No. PTYQ2024BJ0010). |
Corresponding Authors:
Shengcai Shi
E-mail: scshi@pmo.ac.cn
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| About author: 2025-118401-250405.pdf |
Cite this article:
Qiang Zhi(支强), Jiameng Wang(王家萌), Wei Geng(耿伟), Yuhao Hu(胡雨浩), Hao Wu(吴昊), Kangmin Zhou(周康敏), Jiangqiao Ding(丁江乔), Jie Hu(胡洁), Zheng Wang(王争), Wei Miao(缪巍), Jing Li(李婧), and Shengcai Shi(史生才) The 5-THz metal-mesh filters based on Mylar film 2025 Chin. Phys. B 34 118401
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