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9 November 2016 Unpaired Dirac cones in photonic lattices and networks (Conference Presentation)
Yidong Chong, Daniel Leykam, Mikael C. Rechtsman
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Proceedings Volume 9918, Metamaterials, Metadevices, and Metasystems 2016; 99181R (2016) https://doi.org/10.1117/12.2238598
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States
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.
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Yidong Chong, Daniel Leykam, and Mikael C. Rechtsman "Unpaired Dirac cones in photonic lattices and networks (Conference Presentation)", Proc. SPIE 9918, Metamaterials, Metadevices, and Metasystems 2016, 99181R (9 November 2016); https://doi.org/10.1117/12.2238598
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KEYWORDS
Diffraction
Graphene
Scattering
Current controlled current source
Metamaterials
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