Observation of higher-order exceptional points in a non-local acoustic metagrating

Autor: Xinsheng Fang, Nikhil J R K Gerard, Zhiling Zhou, Hua Ding, Nengyin Wang, Bin Jia, Yuanchen Deng, Xu Wang, Yun Jing, Yong Li
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Communications Physics, Vol 4, Iss 1, Pp 1-7 (2021)
Druh dokumentu: article
ISSN: 2399-3650
DOI: 10.1038/s42005-021-00779-x
Popis: Exceptional points are singularities in the parameter space of a physical system where two or more eigenvalues, and their associated eigenvectors, simultaneously coalesce. Here, it is shown that non-local acoustic metagratings that enable precise control over their multiple orders of diffraction, can serve as a robust platform for investigating higher-order exceptional points in free space.
Databáze: Directory of Open Access Journals
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