激光技术2012，Vol.36Issue(4)：508-511,4.DOI:10.3969/j.issn.1001-3806.2012.04.019
大带隙2维正方晶格光子晶体的优化设计
Optimal design of 2-D columnar photonic crystal with square lattice and large bandgap
李爱萍 1王安全 2纪延俊1
作者信息
- 1. 滨州学院物理与电子科学系,滨州256603
- 2. 滨州学院理论物理研究所,滨州256603
- 折叠
摘要
Abstract
In order to study the properties of the complete bandgap of 2-D columnar photonic crystal in square lattice, two types of 2-D photonic crystals were studied based on the plane wave expansion method. The dependence of the complete bandgap on the variation of column radius and the refractive index was studied for a fixed lattice constant. Results show that when the radius of dielectric rods increases, the width of the complete photonic bandgap of photonic crystal composed of Ge cylinders in air background firstly increased, then declined and disappeared at last. When the filling fraction was 38. 3% , as the dielectric
constant of dielectric rods increased, the obtained maximum complete photonic band gap was 0.02754(ωa/2πc) when the refractive
index was 4. 2. It was also found that the bandgap frequency increased when the radius of air rods in Ge background increased. When the filling fraction was 48.3% , as the dielectric constant increased in the background, three complete bandgaps could be
found, and the width of the largest complete bandgap was 0.02922(ωa/2πc)when the background index was 6.2. The photonic
band structure was also shown by the frequency analysis of TE/TM. These results provide theoretical instructions for 2-D square photonic crystals with big photonic bandgap.关键词
材料/2维光子晶体/平面波展开法/完全带隙Key words
materials/2-D photonic crystal/plane-wave expansion method/complete bandgap分类
数理科学引用本文复制引用
李爱萍,王安全,纪延俊..大带隙2维正方晶格光子晶体的优化设计[J].激光技术,2012,36(4):508-511,4.
