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Title: Flexible ultra-wideband terahertz absorber based on vertically aligned carbon nanotubes
Authors: Xiao, Dongyang
Zhu, Minmin
Sun, Leimeng
Zhao, Chun
Wang, Yurong
Teo, Edwin Hang Tong
Hu, Fangjing
Tu, Liangcheng
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Xiao, D., Zhu, M., Sun, L., Zhao, C., Wang, Y., Teo, E. H. T., Hu, F. & Tu, L. (2019). Flexible ultra-wideband terahertz absorber based on vertically aligned carbon nanotubes. ACS Applied Materials & Interfaces, 11(46), 43671-43680.
Journal: ACS Applied Materials & Interfaces 
Abstract: Ultra-wideband absorbers have been extensively used in wireless communications, energy harvesting, and stealth applications. Herein, with the combination of experimental and theoretical analyses, we develop a flexible ultra-wideband terahertz absorber based on vertically aligned carbon nanotubes (VACNTs). Measured results show that the proposed absorber is able to work efficiently within the entire THz region (e.g., 0.1–3.0 THz), with an average power absorptance of >98% at normal incidence. The absorption performance remains at a similar level over a wide range of incident angle up to 60°. More importantly, our devices can function normally, even after being bent up to 90° or after 300 bending cycles. The total thickness of the device is about 360 μm, which is only 1/8 of the wavelength for the lowest evaluated frequency of 0.1 THz. The new insight into the VACNT materials paves the way for applications such as radar cross-section reduction, electromagnetic interference shielding, and flexible sensing because of the simplicity, flexibility, ultra-wideband operation, and large-scale fabrication of the device.
ISSN: 1944-8244
DOI: 10.1021/acsami.9b14428
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
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