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Numerical investigation of the flat band Bloch modes in a 2D photonic crystal with Dirac cones

TitleNumerical investigation of the flat band Bloch modes in a 2D photonic crystal with Dirac cones
Publication TypeJournal Article
Year of Publication2015
AuthorsZhang, P, Fietz, C, Tassin, P, Koschny, T, Soukoulis, CM
JournalOptics Express
Volume23
Pagination10444-10452
Date Published04
Type of ArticleArticle
ISBN Number1094-4087
Accession NumberWOS:000353299300094
Abstract

A numerical method combining complex-k band calculations and absorbing boundary conditions for Bloch waves is presented. We use this method to study photonic crystals with Dirac cones. We demonstrate that the photonic crystal behaves as a zero-index medium when excited at normal incidence, but that the zero-index behavior is lost at oblique incidence due to excitation of modes on the flat band. We also investigate the formation of monomodal and multimodal cavity resonances inside the photonic crystals, and the physical origins of their different line-shape features. (C) 2015 Optical Society of America

DOI10.1364/oe.23.010444
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Metamaterials