Symmetry and degeneracy in metamaterial trimers

ORAL

Abstract

Metamaterial trimers consist of three-coupled split-ring resonators with alternative signs of nearest-neighbor couplings are designed and fabricated. Experimental results from Fourier transform infrared spectroscopy measurements are compared with those of metamaterial dimers. We demonstrate that metamaterial trimers exhibit two-fold degenerate magnetic resonances at infrared frequencies. Remarkably, the degeneracy originates from a new kind of topological symmetry that does not exist in natural materials.

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Authors

  • Chih-Wei Chang

    Nanoscale Science and Engineering Center, University of California at Berkeley

  • Ming Liu

    Nanoscale Science and Engineering Center, University of California at Berkeley

  • Sunghyun Nam

    Nanoscale Science and Engineering Center, University of California at Berkeley

  • Shuang Zhang

    Nanoscale Science and Engineering Center, University of California at Berkeley

  • Guy Bartal

    Nanoscale Science and Engineering Center, University of California at Berkeley

  • Xiang Zhang

    Nanoscale Science and Engineering Center, University of California at Berkeley