Wide-angle and polarization-independent metamaterial absorber based on snowflake-shaped configuration

Y.-J. HuangKey Laboratory of Broadband Optical Fiber Transmission and Communication Networks, School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China

G.-J. WenKey Laboratory of Broadband Optical Fiber Transmission and Communication Networks, School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China

J. LiKey Laboratory of Broadband Optical Fiber Transmission and Communication Networks, School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China

W.-R. ZhuAdvanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria, 3800, Australia

P. WangKey Laboratory of Broadband Optical Fiber Transmission and Communication Networks, School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China

Y.-H. SunKey Laboratory of Broadband Optical Fiber Transmission and Communication Networks, School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China

Abstract

A metamaterial absorber (MA) based on snowflake-shaped resonators is designed and experimentally demonstrated in this paper. Such an MA possesses a nearly perfect absorption with wide angle of incidence and polarization independence. The measurement in a rectangular waveguide system shows the absorptivity as high as 99.5% at 11.28 GHz. Furthermore, the operating frequency can be flexibly controlled by adjusting the lengths of the snowflake's branches, while keep the peak absorptivities nearly uniform (>97.5%). The proposed MA is sure to find wide applications in, for instance, stealth technology, thermal detector and imaging.

Acknowledgments

This work was partially supported by Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20110185110014) and the Fundamental Research Funds for the Central Universities (Grant No. E022050205). W. Zhu also gratefully acknowledges the Australian Research Council for financial support within the frame of the Discovery Grant scheme under Grant DP110100713.

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Wide-angle and polarization-independent metamaterial absorber based on snowflake-shaped configuration

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