Open AccessBand gap characteristics of compound structure composed of lattices with different periodic constants
Author(s) -
Jun Zeng,
Pan Jie-Yong,
JianWen Dong,
He-Zhou Wang
Publication year - 2006
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.55.2785
Subject(s) - lattice constant , lattice (music) , condensed matter physics , square lattice , optics , rod , band gap , materials science , radius , constant (computer programming) , molecular physics , physics , diffraction , medicine , alternative medicine , computer security , pathology , computer science , acoustics , ising model , programming language
Our numerical simulation results show that if a compound structure is composed of a lattice with a larger periodic constant and a lattice with a small periodic constant, the lattice with larger periodic constant will play the role of defects. The frequencies of defect modes are dependent on the rod radius (r2) of square lattice with a larger periodic constant, and the relationship of the defect modes and r2 is almost independent of a2. The defect mode is dependent on incidence angle when a22. Furthermore, by optimizing the size of the rods (r2) of the larger periodic lattice, single defect mode, multiple defect modes with equal or different frequency spacing, including single polarization or TE and TM overlap defect mode, can be gotten respectively. The transmissivity of the defect modes are inversely proportional to a2.