摘要
用传输矩阵法研究了在不同入射角时对称缺陷复合光子晶体[D(AB)mD]2结构s偏振和p偏振的光传输特性。计算结果表明:对称缺陷复合光子晶体[D(AB)mD]2结构中的禁带出现两个完全共振透射峰。随着入射角的增大,s光和p光的带隙中心和透射峰都向高频方向移动,s光的带宽增大,p光的带宽减小,但带隙中心始终相同。通过微小地改变入射角可改变透射峰的频率和偏振态。此结果为该结构实现双通道方位开关和偏振器提供了理论依据,也为拓宽该结构带隙和得到所需要的偏振光提供了理论基础。
By using the method of optical transfer matrix, the s and p polarization light transmission properties of compound photonic crystal with two symmetrical defect layer at the two ports [D（AB）^mD]^2 structure are studied. The in vestigation results show that two resonance transmittance peaks exist in the band gap in compound photonic crystal [D （AB）^mD]^2 structure. With the increasing of the angles of incidence, the frequency of the band gap center and transmit- tance peaks of s and p polarized light are increasing, and the bandwidth of s polarized light is increasing and that of p po- larized light is decreasing, however, the center of band gap of s and p polarized light is identical. The frequency and the polarized state of transmittance peaks will be changed with the small changes of he angles of ineidence. The conclusion might be used to dual-channeled orientation switching and polarizer. It provides theoretical basis on obtaining the desired polarized light and widening the band gap of the photonie crystal structure.
出处
《光学技术》
CAS
CSCD
北大核心
2013年第5期472-476,共5页
Optical Technique
基金
茂名市科技计划项目(2012B01005)资助
关键词
复合光子晶体
入射角
偏振态
方位开关
compound photonic crystal
angles of incidence
polarized state
orientation switching
