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

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.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [3]
  1. Ames Laboratory, Ames, IA (United States)
  2. Chalmers University, Goteborg (Sweden)
  3. Ames Laboratory, Ames, IA (United States); Institute of Electronic Structure (IESL), Crete (Greece)
Publication Date:
Grant/Contract Number:
AC02-07CH11358
Type:
Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 23; Journal Issue: 8; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1222295
Alternate Identifier(s):
OSTI ID: 1201627