Unidirectional Negative Refraction at an Exceptional Point of Acoustic PT-Symmetric Systems

We demonstrate a method to realize unidirectional negative refraction in an acoustic parity-time ( PT )-symmetric system, which is composed of a pair of metasurfaces sandwiching an air gap. The pair of metasurfaces possesses loss and gain modulations. The unidirectional negative refraction, which is...

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Veröffentlicht in:	Chinese physics letters 2023-11, Vol.40 (12), p.124301-70
Hauptverfasser:	Liu, Chen, Lan, Jun, Gu, Zhongming, Zhu, Jie
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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