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
PublisherOSA - The Optical Society
ISBN (Electronic)9781557528209
StatePublished - Jan 1 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


OtherCLEO: QELS_Fundamental Science, CLEO_QELS 2018
CountryUnited States
CitySan Jose

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials

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    Cerjan, A., Huang, S., Chen, K. P., Chong, Y., & Rechtsman, M. (2018). Weyl exceptional ring in a helical waveguide array. In CLEO: QELS_Fundamental Science, CLEO_QELS 2018 (Optics InfoBase Conference Papers; Vol. Part F93-CLEO_QELS 2018). OSA - The Optical Society. https://doi.org/10.1364/CLEO_QELS.2018.FM3Q.2