Experimental Demonstration of an Anisotropic Exceptional Point

Kun Ding, Guancong MA, Z. Q. Zhang, C. T. Chan

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Exceptional points (EPs) associated with a square-root singularity have been found in many non-Hermitian systems. In most of the studies, the EPs found are isotropic, meaning that the same singular behavior is obtained independent of the direction from which they are approached in the parameter space. In this Letter, we demonstrate both theoretically and experimentally the existence of an anisotropic EP in an acoustic system that shows different singular behaviors when the anisotropic EP is approached from different directions in the parameter space. Such an anisotropic EP arises from the coalescence of two square-root EPs having the same chirality.

Original languageEnglish
Article number085702
JournalPhysical Review Letters
Volume121
Issue number8
DOIs
Publication statusPublished - 21 Aug 2018

Scopus Subject Areas

  • Physics and Astronomy(all)

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