A high-selectivity THz band-stop filter based on a flexible polyimide film

Dongwei Zhai; Rong Zhao; Zhaoxin Geng; Bin Cui; Yuping Yang

doi:10.1117/12.2500900

9 November 2018 A high-selectivity THz band-stop filter based on a flexible polyimide film

Dongwei Zhai, Rong Zhao, Zhaoxin Geng, Bin Cui, Yuping Yang

Proceedings Volume 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V; 1082613 (2018) https://doi.org/10.1117/12.2500900
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

In this work, we demonstrate a high-selectivity terahertz (THz) band-stop filter with a wide range of center wavelengths (CWLs) from 150 to 600 μm (2.0 THz to 0.5 THz). The dip transmission is lower than 10 % at the center CWLs, even to 5 % at 1.9 THz. The band-stop terahertz filter is based on periodic metallic Cross Cell (CC) structures deposited on the top of a 50 μm thick polyimide film (Kapton) with low absorption and good mechanical properties, resulting in a large-area, freestanding and flexible membrane with a low intrinsic loss. The excellent tunable terahertz band-stop filter properties are investigated using terahertz time-domain spectroscopy. The measured and simulated results are coming to an excellent agreement. The THz band-stop filter possesses not only a light weight and polarization insensitivity but also a simple structure and high integration.

Citation Download Citation

Dongwei Zhai, Rong Zhao, Zhaoxin Geng, Bin Cui, and Yuping Yang "A high-selectivity THz band-stop filter based on a flexible polyimide film", Proc. SPIE 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V, 1082613 (9 November 2018); https://doi.org/10.1117/12.2500900

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