Weyl exceptional ring in a helical waveguide array

Alexander Cerjan, Sheng Huang, Kevin P. Chen, Yidong Chong, Mikael Rechtsman

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We demonstrate the existence of a topologically charged contour consisting entirely of exceptional points in a non-Hermitian helical waveguide array. We observe both protected chiral edge states and the lack of conical diffraction.

Original languageEnglish (US)
Title of host publicationCLEO
Subtitle of host publicationQELS_Fundamental Science, CLEO_QELS 2018
PublisherOptica Publishing Group (formerly OSA)
ISBN (Print)9781943580422
StatePublished - 2018
EventCLEO: QELS_Fundamental Science, CLEO_QELS 2018 - San Jose, United States
Duration: May 13 2018May 18 2018

Publication series

NameOptics InfoBase Conference Papers
VolumePart F93-CLEO_QELS 2018
ISSN (Electronic)2162-2701


OtherCLEO: QELS_Fundamental Science, CLEO_QELS 2018
Country/TerritoryUnited States
CitySan Jose

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials


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