Organohydrogel-based transparent terahertz absorber via ionic conduction loss

Wenke Xie; Qian Tang; Jinlong Xie; Yang Fei; Hujie Wan; Tao Zhao; Tianpeng Ding; Xu Xiao; Qiye Wen

doi:10.1038/s41467-023-44344-2

Organohydrogel-based transparent terahertz absorber via ionic conduction loss

Nat Commun. 2024 Jan 2;15(1):38. doi: 10.1038/s41467-023-44344-2.

Authors

Wenke Xie^#¹, Qian Tang^#¹, Jinlong Xie¹, Yang Fei², Hujie Wan¹, Tao Zhao^{2

3

4

5}, Tianpeng Ding^{6

7}, Xu Xiao^{8

9}, Qiye Wen^{10

11

12}

Affiliations

¹ School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China.
² School of Physics, University of Electronic Science and Technology of China, Chengdu, China.
³ State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China.
⁴ Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, China.
⁵ Chengdu Research Institute, University of Electronic Science and Technology of China, Chengdu, China.
⁶ School of Physics, University of Electronic Science and Technology of China, Chengdu, China. dingtp@uestc.edu.cn.
⁷ State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China. dingtp@uestc.edu.cn.
⁸ School of Physics, University of Electronic Science and Technology of China, Chengdu, China. xuxiao@uestc.edu.cn.
⁹ State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China. xuxiao@uestc.edu.cn.
¹⁰ School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China. qywen@uestc.edu.cn.
¹¹ State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China. qywen@uestc.edu.cn.
¹² Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, China. qywen@uestc.edu.cn.

^# Contributed equally.

Abstract

The fast-growing terahertz technologies require high-performance terahertz absorber for suppressing electromagnetic interference. Since the dissipation mechanism in terahertz band usually focuses on electronic conduction loss, almost all terahertz absorbers are constructed with electronically conducting materials being opaque, which limits their applications in scenarios requiring high visible transmittance. Here, we demonstrate a transparent terahertz absorber based on permittivity-gradient elastomer-encapsulated-organohydrogel. Our organohydrogel-based terahertz absorber exhibits a high absorbing property (average reflection loss of 49.03 dB) in 0.5-4.5 THz band with a thin thickness of 700 μm and a high average visible transmittance of 85.51%. The terahertz absorbing mechanism mainly derives from the ionic conduction loss of the polar liquid in organohydrogel. Besides, the hydrophobic and adhesive elastomer coating endows this terahertz absorber high absorbing stability and interfacial adhesivity. This work paves a viable way to designing transparent terahertz absorbers.

Abstract

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