Open AccessTheoretical bandgap modeling of two-dimensional triangular photonic crystals formed by interference technique of three-noncoplanar beams
Author(s) -
Xinglin Yang,
Lutong Cai,
Q. Liu
Publication year - 2003
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.11.001050
Subject(s) - optics , photonic crystal , finite difference time domain method , polarization (electrochemistry) , materials science , interference (communication) , circular polarization , lithography , band gap , holography , physics , optoelectronics , telecommunications , channel (broadcasting) , chemistry , computer science , microstrip
Using the block-iterative frequency domain method and the nonorthogonal FDTD method, the photonic band gap (PBG) and spectral properties are investigated for a new class of two-dimensional (2-D) trigonal structures with an approximately circular or exagonal "atom" shape formed by holographic lithography. Calculations of band structures as a function of the intensity threshold show that the PBG of 2-D titania arrays opens only for TM polarization, and directional PBG can open for TE and TM polarization simultaneously. In addition, up to four sizeable full PBGs can open for an inverted GaAs triangular structure.