Abstract
Abstract
In this paper, high-contrast gratings based spoof surface plasmon polaritons (HCG-based SSPPs), as a new mechanism of all-dielectric metamaterial absorbers (ADMMAs), are used to enhance their bandwidth. Accordingly, a broadband ADMMA is designed with carbon black composite. It consists of a cylinder array structure which is made of this composite. The simulation results show that broadband absorption is realized from 6.1 GHz to 18 GHz with three absorption peaks under a total thickness of 3.9 mm. The first peak is attributed to HCG-based SSPPs, while the other two are attributed to diffraction effects. The improved impedance matching characteristic in a wide band also makes an important contribution. The experimental results are agreed roughly with the simulation results. In addition, the structure designed is not a standard HCG, indicating that HCG-based SSPPs are expected to become universal mechanism of ADMMAs. It is believed that this work will push forward further studies on more applications of HCG-based SSPPs in ADMMAs.
Funder
Priority Academic Program Development of Jiangsu Higher Education Institutions
National Natural Science Foundation of China
Subject
Condensed Matter Physics,Mathematical Physics,Atomic and Molecular Physics, and Optics
Cited by
2 articles.
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