Observation of second-order corner skin modes in non-Hermitian electric circuits (Conference Presentation)

Yung Kim; Minwook Kyung; Hee Chul Park; Kyungmin Lee; Jung-Wan Ryu; Moon Jip Park; Bumki Min

doi:10.1117/12.2631830

3 October 2022 Observation of second-order corner skin modes in non-Hermitian electric circuits (Conference Presentation)

Yung Kim, Minwook Kyung, Hee Chul Park, Kyungmin Lee, Jung-Wan Ryu, Moon Jip Park, Bumki Min

Author Affiliations +

Proceedings Volume PC12195, Metamaterials, Metadevices, and Metasystems 2022; PC121951A (2022) https://doi.org/10.1117/12.2631830
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

We report the experimental observation of second-order corner skin modes in a two-dimensional non-Hermitian electric circuit network describable with the Su-Schrieffer-Heeger model in one spatial direction and the Hatano-Nelson model in the orthogonal direction. A circuit Laplacian is reconstructed by a series of current-voltage measurements, from which complex admittance spectra and corresponding voltage distributions are obtained. In a L×L square lattice, the number of corner skin modes is found to be 2L, implying that the observed corner skin modes originate from a non-Hermitian topology.

Conference Presentation

Citation Download Citation

Yung Kim, Minwook Kyung, Hee Chul Park, Kyungmin Lee, Jung-Wan Ryu, Moon Jip Park, and Bumki Min "Observation of second-order corner skin modes in non-Hermitian electric circuits (Conference Presentation)", Proc. SPIE PC12195, Metamaterials, Metadevices, and Metasystems 2022, PC121951A (3 October 2022); https://doi.org/10.1117/12.2631830

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