Water metamaterial for ultra-broadband and wide-angle absorption

A subwavelength water metamaterial is proposed and analyzed for ultra-broadband perfect absorption at microwave frequencies. We experimentally demonstrate that this metamaterial shows over 90% absorption within almost the entire frequency band of 12-29.6 GHz. It is also shown that the proposed metam...

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Bibliographic Details
Published in:Optics express 2018-02, Vol.26 (4), p.5052-5059
Main Authors: Xie, Jianwen, Zhu, Weiren, Rukhlenko, Ivan D, Xiao, Fajun, He, Chong, Geng, Junping, Liang, Xianling, Jin, Ronghong, Premaratne, Malin
Format: Article
Language:English
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Summary:A subwavelength water metamaterial is proposed and analyzed for ultra-broadband perfect absorption at microwave frequencies. We experimentally demonstrate that this metamaterial shows over 90% absorption within almost the entire frequency band of 12-29.6 GHz. It is also shown that the proposed metamaterial exhibits a good thermal stability with its absorption performance almost unchanged for the temperature range from 0 to 100°C. The study of the angular tolerance of the metamaterial absorber shows its ability of working at wide angles of incidence. Given that the proposed water metamaterial absorber is low-cost and easy for manufacture, we envision it may find numerous applications in electromagnetics such as broadband scattering reduction and electromagnetic energy harvesting.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.26.005052