Open AccessDiffracted transmission effects of GaN and polymer two-dimensional square-lattice photonic crystals
Author(s) -
Chao Xiong,
Zhang Bei,
Xiaoning Kang,
Dai Taguchi,
Guoyi Zhang
Publication year - 2009
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.17.023684
Subject(s) - diffraction , optics , materials science , photonic crystal , rigorous coupled wave analysis , square lattice , bragg's law , diffraction efficiency , lattice (music) , optoelectronics , diffraction grating , physics , condensed matter physics , acoustics , ising model
The effects of the lattice pitch of GaN and polymer square-lattice photonic crystal (2PhC) on the diffracted transmission were studied by using rigorous coupled wave analysis (RCWA). Besides the first-order Bragg diffraction, higher-order diffractions from large pitches of PhC are also significant to the light extraction improvement. Three different diffraction mechanisms are illustrated through wave vector analysis. The enhancement factors of integrated transmission are obtained from a wide range of pitches with micro-scale for both GaN and polymer 2PhC. The experimental angular-resolved transmission on a transparent polymer sample of 2 microm pitch 2PhC is comparable to the simulation.