摘要
用两种正折射率材料设计了一维光子晶体异质结构模型,并利用传输矩阵法对该光子晶体的透射谱进行了理论研究。结果发现:光通过光子晶体时,在较宽的禁带范围内出现透射率为100%的多条共振模,且共振模的数目与光子晶体结构周期数m相对应;当入射角一定时,共振模的位置可以通过介质的折射率、厚度来调制;当入射光入射角度增大时,多共振模出现整体蓝移,同时共振模宽度变窄。这些特性有望应用于多通道窄带滤波器的设计。
The heterostructure of one-dimensional photonic crystal is designed by using two positive index materials, and its transmission spectrum is investigated by transfer matrix method. It is found that the multi- resonant modes with transmission rate of 100% appeared in the relative wide forbidden band range and the resonant mode＇ s number is the same as the structure＇ s cycle when the light passed photonic crystal. The refractive index and thickness of medium can be used to change the position of reso- nant mode as incident angle is constant. The position of all resonant modes move to blue-ray direction and the width of resonant mode become narrower with the angle of incident light is changed. These features can be applied for design of narrowband multi- channel filter.
出处
《光学技术》
CAS
CSCD
北大核心
2013年第1期92-96,共5页
Optical Technique
基金
广西自然科学基金项目(2011GXNSFA018145)
广西高校优秀人才资助计划项目(桂教人[2011]40号)
河池学院青年科研课题立项项目(2012B-N001)
关键词
光子晶体
异质结构
透射谱
共振模
滤波功能
photonic crystal
heterostructure
transmission spectrum
resonant mode
filter function
