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Proceedings Paper

A high-selectivity THz band-stop filter based on a flexible polyimide film
Author(s): Dongwei Zhai; Rong Zhao; Zhaoxin Geng; Bin Cui; Yuping Yang
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Paper 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.

Paper Details

Date Published: 9 November 2018
PDF: 7 pages
Proc. SPIE 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V, 1082613 (9 November 2018); doi: 10.1117/12.2500900
Show Author Affiliations
Dongwei Zhai, Minzu Univ. of China (China)
Rong Zhao, Minzu Univ. of China (China)
Zhaoxin Geng, Minzu Univ. of China (China)
Bin Cui, Minzu Univ. of China (China)
Yuping Yang, Minzu Univ. of China (China)

Published in SPIE Proceedings Vol. 10826:
Infrared, Millimeter-Wave, and Terahertz Technologies V
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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