Open AccessPhotonic band gaps of two-dimensional hexagon-lattice photonic crystals based on Taiji-shaped dielectric rods
Author(s) -
Sheng Juan-Juan,
Xiaodong He,
Bin Liu,
Shujing Li
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.084213
Subject(s) - photonic crystal , plane wave expansion method , rod , dielectric , optics , photonics , materials science , band gap , plane wave expansion , lattice (music) , yablonovite , condensed matter physics , lattice constant , physics , optoelectronics , diffraction , photonic integrated circuit , medicine , alternative medicine , pathology , acoustics
We present a novel structure of two-dimensional (2D) hexagon-lattice photonic crystal with asymmetrical scatterers-Taiji-shaped scatterers. The properties of photonic band gap (PBG) and the influence of parameter on absolute photonic band gap are analyzed by plane wave expansion method. The calculation results demonstrate that the reduction of scatterer symmetry can produce an increase in the number of PBG and a broadening of PBG width for both TE and TM model, which is conducive to obtaining wider and more absolute PBG. By optimizing the parameters of structure, we obtain the widest absolute PBG 0.0541(ωa / 2πc) at ε = 17, R= 0.38 μm, r=0.36R, and θ = 0° and the maximum of 8 absolute PBGs at ε = 16, R=0.44, r=0.2R, and θ = 0°.