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Proceedings Paper

Unpaired Dirac cones in photonic lattices and networks (Conference Presentation)
Author(s): Yidong Chong; Daniel Leykam; Mikael C. Rechtsman

Paper Abstract

Unpaired Dirac cones are bandstructures with two bands crossing at a single point in the Brillouin zone. It is known that photonic bandstructures can exhibit pairs of Dirac cones, similar to graphene; unpaired cones, however, have not observed in photonics, and have been observed in condensed-matter systems only among topological insulator surface states. We show that unpaired Dirac cones occur in a 2D photonic lattice that is not the surface of a 3D system. These modes have unusual properties, including conical diffraction and antilocalization immune to short-range disorder, due to the absence of "intervalley" scattering between Dirac cones.

Paper Details

Date Published: 9 November 2016
PDF: 1 pages
Proc. SPIE 9918, Metamaterials, Metadevices, and Metasystems 2016, 99181R (9 November 2016); doi: 10.1117/12.2238598
Show Author Affiliations
Yidong Chong, Nanyang Technological Univ. (Singapore)
Daniel Leykam, Nanyang Technological Univ. (Singapore)
Mikael C. Rechtsman, The Pennsylvania State Univ. (United States)

Published in SPIE Proceedings Vol. 9918:
Metamaterials, Metadevices, and Metasystems 2016
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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