中国物理B ›› 2025, Vol. 34 ›› Issue (11): 118401-118401.doi: 10.1088/1674-1056/addbca

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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. 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
  • 收稿日期:2025-03-12 修回日期:2025-04-18 接受日期:2025-05-22 发布日期:2025-11-10
  • 通讯作者: Shengcai Shi E-mail:scshi@pmo.ac.cn
  • 基金资助:
    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).

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. 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
  • Received:2025-03-12 Revised:2025-04-18 Accepted:2025-05-22 Published:2025-11-10
  • Contact: Shengcai Shi E-mail:scshi@pmo.ac.cn
  • About author:2025-118401-250405.pdf
  • Supported by:
    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).

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摘要： 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

关键词: metal-mesh filter, Mylar film, transmittance

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

Key words: metal-mesh filter, Mylar film, transmittance

中图分类号:  (Filters)

  • 84.30.Vn
85.25.Pb (Superconducting infrared, submillimeter and millimeter wave detectors) 07.57.-c (Infrared, submillimeter wave, microwave and radiowave instruments and equipment)