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  • Letter

Microwave one-way transparency by large synthetic motion of magnetochiral polaritons in metamolecules

Kentaro Mita1, Toshiyuki Kodama2,3, Toshihiro Nakanishi4, Tetsuya Ueda5, Kei Sawada6, Takahiro Chiba7,8, and Satoshi Tomita1,2,*

  • 1Department of Physics, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
  • 2Institute for Excellence in Higher Education, Tohoku University, Sendai 980-8576, Japan
  • 3Organization for Advanced Studies, Tohoku University, Sendai 980-8576, Japan
  • 4Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510, Japan
  • 5Department of Electrical Engineering and Electronics, Kyoto Institute of Technology, Kyoto 606-8585, Japan
  • 6RIKEN SPring-8 Center, Sayo 679-5148, Japan
  • 7Department of Information Science and Technology, Graduate School of Science and Engineering, Yamagata University, Yonezawa 992-8510, Japan
  • 8Department of Applied Physics, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan

  • *Contact author: tomita@tohoku.ac.jp
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Phys. Rev. B 113, L121406 – Published 16 March, 2026

DOI: https://doi.org/10.1103/qlg7-ygq8

Abstract

We observe microwave nonreciprocal one-way transparency via ultrastrongly coupled magnetochiral polaritons (MChPs) in a metamolecule at room temperature. The experimental results using MCh metamolecules with simultaneous breaking of time-reversal and space-inversion symmetries are reproduced by numerical simulations. Based on effective polarizability tensor analyses, we verify massive synthetic motion of MChPs as an origin of the one-way transparency. This study paves a way to hybrid quantum systems and synthetic gauge fields using metamaterials.

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Phys. Rev. B 113, L121406– Published 16 March, 2026
  • Received 28 March 2025
  • Revised 23 January 2026
  • Accepted 13 February 2026
Article part of CHORUS
Accepted manuscript will be available starting 16 March, 2027.
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