Nature-Ring of Exceptional Points on a Dirac Cone

Spawning rings of exceptional points out of Dirac cones

Bo Zhen, Chia Wei Hsu, Yuichi Igarashi, Ling Lu, Ido Kaminer, Adi Pick, Song-Liang Chua, John D. Joannopoulos& Marin Soljačić
Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA
Smart Energy Research Laboratories, NEC Corporation, 34 Miyuiga-ka, Tsukuba, Ibaraki 305-8501, Japan
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
DSO National Laboratories, 20 Science Park Drive, Singapore 118230, Singapore
Nature 525,354–358(17 September 2015) 
DOI: 10.1038/nature14889
© 2015 Macmillan Publishers Limited. All Rights Reserved.
The first experimental demonstration of a ring of exceptional points in a photonic crystal slab. This groundbreaking research could potentially lead to more powerful lasers, precise optical sensors, and other devices.