Open AccessRefraction and band isotropy in 2D square-like Archimedean photonic crystal lattices
Author(s) -
Dragoljub Jovanović,
Radoš Gajić,
Kurt Hingerl
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.004048
Subject(s) - photonic crystal , optics , isotropy , square lattice , brillouin zone , square (algebra) , band gap , negative refraction , physics , condensed matter physics , electronic band structure , refractive index , geometry , mathematics , ising model
In this paper we theoretically study refraction effects in the 2D square-like Archimedean photonic crystals (3(2), 4, 3, 4) and (4, 8(2)) made of dielectric rods in air. In addition, we investigated a band isotropy and band gap structure in these lattices. We compared the square and square-like structures as well, their refraction characteristics, zone structures and the level of band and band gap isotropy (bandwidth and band gap dependence on the wave vector). We found that square-like structures can have some advantages over the square ones regarding the completeness of the gap, its isotropy and the gap width. Also, due to the same square primitive unit cell and the first Brillouin zone, the square and square-like lattices have similar optical response in lower bands.