Open AccessGuide modes at interface of photonic crystal heterostructures composed of different lattices
Author(s) -
Jiang-Tao Liu,
Zhou Yun-Song,
Fu-He Wang,
Gu Ben-Yuan
Publication year - 2004
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.53.1845
Subject(s) - heterojunction , photonic crystal , transverse plane , condensed matter physics , lattice (music) , plane wave expansion method , square lattice , materials science , dielectric , optics , plane wave expansion , hexagonal lattice , supercell , band gap , physics , optoelectronics , thunderstorm , structural engineering , antiferromagnetism , meteorology , acoustics , ising model , engineering
We have investigated the guide modes in two kinds of two-dimensional photonic crystal heterostructures by using the plane wave expansion method combined with the supercell technique. These heterostructures consist of different air cylinders embedded into host dielectric in different lattices. Namely, One heterostucture is composed of square cylinders in square lattice and hexagon cylinders in triangular lattice (SSTH heterostucture). The other heterostucture is composed of rectangular cylinders in rectangular lattice and circle cylinders in triangular lattice(RRTC heterostucture). We find that the SSTH heterostucture may produce guide modes in absolute photonic band gap (PBG) when introducing relative longitudinal gliding or transverse displacement of the sub-lattices along the interface of the heterostructure. But the RRTC heterostucture can produce guide modes in absolute PBG without any relative longitudinal gliding or transverse displacement. This feature is quite different from other pure dielectric photonic crystals heterostructures.