Water metamaterial for ultra-broadband and wide-angle absorption

Optics Express
Jianwen XieMalin Premaratne

Abstract

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.

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Citations

Apr 2, 2019·Scientific Reports·Xiaqing SunFuli Zhang
Sep 13, 2019·Optics Express·Jiaqi ZhangWeili Zhang
Sep 10, 2020·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Igor KonIlia Samusev
Oct 24, 2019·ACS Applied Materials & Interfaces·Dongyang XiaoLiangcheng Tu

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