Experimental Demonstration of an Anisotropic Exceptional Point

Kun Ding, Guancong Ma*, Z. Q. Zhang, C. T. Chan*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

85 Citations (Scopus)
22 Downloads (Pure)


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
Number of pages5
JournalPhysical Review Letters
Issue number8
Early online date21 Aug 2018
Publication statusPublished - 24 Aug 2018

Scopus Subject Areas

  • Physics and Astronomy(all)


Dive into the research topics of 'Experimental Demonstration of an Anisotropic Exceptional Point'. Together they form a unique fingerprint.

Cite this