摘要
利用复折射率的方法和膜系设计软件TFcalc分别研究了入射角和杂质吸收对一维光子晶体反射镜反射谱和透射谱的影响。结果表明:随着入射角的增大,一维光子晶体反射镜的禁带中心位置蓝移,禁带宽度减小。入射角小于60°时,带隙势阱深度几乎不变,大于60°后带隙势阱深度变化较大。当入射角无限接近90°时,P偏振光的带隙几乎消失,S偏振光的带隙几乎保留。杂质吸收对于一维光子晶体的反射谱和透射谱显著影响时的临界消光系数值分别是0.001和0.0003。高折射率介质层的杂质吸收对光谱的影响较小。
In order to investigate the influence of incident angle and impurity absorption on one-dimensional photonic crystal reflectors, the complex refractive index method and TFcalc software are adopted. The results show that the centre of the band gap moves to the short-wave direction horizontally, and the bandgap width gets narrower, as the incident angle increases. When the incident angle is below 60° ,the depth of the band gap is almost unchanged,while the incident angle is over 60°, the depth of the band gap largely changed. As the incident angle gets close to 90° infinitely, the band gap for P polarization light nearly disappeared, however, the band gap for S polarization light almost reserved. When impurity absorption remarkably affects the transmissivity and reflectivity of the one-dimensional photonic crystal, the critical values of the extinction coefficient are 0. 0003 and 0.001, respectively. The absorption of the high-re- fractive index films affects the spectra less.
出处
《激光与红外》
CAS
CSCD
北大核心
2013年第6期658-662,共5页
Laser & Infrared
基金
国家自然科学基金项目(No.61275147)
山东省优秀中青年科学家科研奖励基金项目(No.BS2009DX014)
山东省科技攻关计划项目(No.2010GGX10127)
聊城大学重点科研基金项目资助
关键词
一维光子晶体
入射角
偏振
消光系数
带隙宽度
one-dimensional photonic crystal
incident angle
polarization
extinction coefficient
band gap
