Issue |
EPJ Appl. Metamat.
Volume 4, 2017
Artificial materials for advanced applications in electromagnetics and mechanics
|
|
---|---|---|
Article Number | 2 | |
Number of page(s) | 7 | |
DOI | https://doi.org/10.1051/epjam/2016016 | |
Published online | 13 January 2017 |
https://doi.org/10.1051/epjam/2016016
Research Article
Theoretical study on dynamical planar-chirality switching in checkerboard-like metasurfaces
1
Department of Electronic Science and Engineering, Kyoto University, Kyoto
615-8510, Japan
2
Center for Energy and Environmental Science, Shinshu University, 4-17-1 Wakasato, Nagano
380-8553, Japan
* e-mail: urade@giga.kuee.kyoto-u.ac.jp
Received:
10
September
2016
Accepted:
15
November
2016
Published online: 13 January 2017
In this paper, we show that the handedness of a planar chiral checkerboard-like metasurface can be dynamically switched by modulating the local sheet impedance of the metasurface structure. We propose a metasurface design to realize the handedness switching and theoretically analyze its electromagnetic characteristic based on Babinet’s principle. Numerical simulations of the proposed metasurface are performed to validate the theoretical analysis. It is demonstrated that the polarity of asymmetric transmission for circularly polarized waves, which is determined by the planar chirality of the metasurface, is inverted by switching the sheet impedance at the interconnection points of the checkerboard-like structure. The physical origin of the asymmetric transmission is also discussed in terms of the surface current and charge distributions on the metasurface.
Key words: Planar chirality / Asymmetric transmission / Tunable metamaterials / Babinet’s principle
© Y. Urade et al., Published by EDP Sciences, 2017
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