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Reconfigurable Terahertz Quarter-Wave Plate for Helicity Switching Based on Babinet Inversion of an Anisotropic Checkerboard Metasurface

Yosuke Nakata1,*, Kai Fukawa2, Toshihiro Nakanishi3, Yoshiro Urade4, Kunio Okimura5, and Fumiaki Miyamaru2,6

  • 1Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
  • 2Department of Physics, Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan
  • 3Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan
  • 4Center for Emergent Matter Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
  • 5School of Engineering, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan
  • 6Center for Energy and Environmental Science, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan

  • *nakata@qc.rcast.u-tokyo.ac.jp
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Phys. Rev. Applied 11, 044008 – Published 3 April, 2019

DOI: https://doi.org/10.1103/PhysRevApplied.11.044008

Abstract

Dynamic helicity switching by utilizing metasurfaces is challenging because it requires deep modulation of polarization states. To realize such helicity switching, this paper proposes a dynamic metasurface functioning as a switchable quarter-wave plate, the fast axis of which can be dynamically rotated by 90∘. The device is based on the critical transition of an anisotropic metallic checkerboard, which realizes the deep modulation and simultaneous design of the switchable states. After verifying the functionality of the ideally designed device in a simulation, we tune its structural parameters to realize practical experiments in the terahertz frequency range. By evaluating the fabricated sample with vanadium dioxide, the conductivity of which can be controlled by temperature, its dynamic helicity switching function is demonstrated.

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Phys. Rev. Applied 11, 044008– Published 3 April, 2019
  • Received 20 May 2018
  • Revised 16 January 2019
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