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Polarization-Independent Wide-Angle Terahertz Metamaterial Absorber: Design, Fabrication and Characterization
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Document Title
Polarization-Independent Wide-Angle Terahertz Metamaterial Absorber: Design, Fabrication and Characterization
Author
Tantiwanichapan K, Ruangphanit A, Yamwong W, Meananeatra R, Srihapat A, Chia JY, Cota N, Prasertsuk K, Rattanawan P, Thanapirom C, Jintamethasawat R, Kasamsook K, Klunngien N
Name from Authors Collection
Scopus Author ID
55203603600
Affiliations
National Science & Technology Development Agency - Thailand; National Electronics & Computer Technology Center (NECTEC)
Type
Article
Source Title
PROGRESS IN ELECTROMAGNETICS RESEARCH M
Year
2019
Volume
87
Issue
5
Open Access
gold
Publisher
ELECTROMAGNETICS ACAD
DOI
10.2528/PIERM19081605
Format
Abstract
A metamaterial absorber in the Terahertz (THz) range is simulated and experimentally investigated in this work. The desired absorption frequency, efficiency, and bandwidth can be tuned by changing the metal and dielectric geometric parameters. An absorption greater than 85% for TM polarized light with an incident angle up to 70 degrees at any azimuthal direction is observed in a circular disc THz metamaterial structure. By adjusting the dielectric silicon dioxide (SiO2) thickness to 4 mu m, an optimal absorption greater than 95% can be achieved at a resonance frequency of 0.97 THz. The experimental results also indicate that using Titanium (Ti) as a metamaterial metal layer provides four times broader absorption bandwidth than Aluminium (Al). This study, which works on polarization-insensitive and wide-angle metamaterial absorbers, can be fundamentally applied to many THz applications including THz spectroscopy, imaging, and detection.
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WOS
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Polarization-Independent Wide-Angle Terahertz Metamaterial Absorber Design Fabrication and CharacterizationDownload