摘要
为了实现光子晶体的多通道滤波,对设计出的一维掺杂光子晶体进行了数值计算和理论分析。结果表明:多通道透射峰的波长与空气膜厚度呈线性变化,不同厚度的空气膜可以截到数目不同的透射峰,多通道透射峰的半高宽随光子晶体折射率n2的增加而减小。以此为基础,设计出滤波通道波长的可调范围达60 nm,滤波通道半高宽的可调范围为1 nm^5 nm,滤波通道透射峰值大于0.98的一维光子晶体三通道可调谐滤波器。
In order to implement the multi-channel filtering of the photonic crystal, the numerical calculation and theoretical analysis for the one-dimensional photonic crystal were performed. The result indicates that the wavelength of the multi-channel transmission peak presents linear variation with the optical thickness of the air layer, the air layers with different thickness can capture the different numbers of the transmission peaks, and the FWHM of multi- channel transmission peak is decreased with the increase of the photonic crystal refractive index. Based on the results, the one-dimensional photonic crystal three-channel tunable filter, whose filtering channel has a tunable wavelength range of 60 nm, a tunable range of FWHM is 1 nm-5 nm, and a transmission peak is 0.98, was designed.
出处
《应用光学》
CAS
CSCD
2008年第4期639-643,共5页
Journal of Applied Optics
关键词
光子晶体
多通道滤波
缺陷模
可调谐滤波器
photonic crystal
multi-channel filtering
defect mode
tunable filter
