Ultra-wide tuning single channel filter based on one-dimensional photonic crystal with an air cavity  

作　　者：Xiaodan Zhao Yibiao Yang Zhihui Chen Yuncai Wang Hongming Fei Xiao Deng 

机构地区：[1]Department of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China [2]Key Laboratory of Advanced Transducers and Intelligent Control System, Taiyuan University of Technology,Ministry of Education, Taiyuan 030024, China

出　　处：《Journal of Semiconductors》2017年第2期26-30,共5页半导体学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Nos.61575138,61307069,51205273);the Top Young Academic Leaders and the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi

摘　　要：By inserting an air cavity into a one-dimensional photonic crystal of LiF/GaSb, a tunable filter covering the whole visible range is proposed. Following consideration of the dispersion of the materials, through modulating the thickness of the air cavity, we demonstrate that a single resonant peak can shift from 416.1 to 667.3 nm in the band gap at normal incidence by means of the transfer matrix method. The research also shows that the transmittance of the channel can be maximized when the number of periodic Li F/Ga Sb layers on one side of the air defect layer is equal to that of the other side. When adding a period to both sides respectively, the full width at half maximum of the defect mode is reduced by one order of magnitude. This structure will provide a promising approach to fabricate practical tunable filters in the visible region with ultra-wide tuning range.By inserting an air cavity into a one-dimensional photonic crystal of LiF/GaSb, a tunable filter covering the whole visible range is proposed. Following consideration of the dispersion of the materials, through modulating the thickness of the air cavity, we demonstrate that a single resonant peak can shift from 416.1 to 667.3 nm in the band gap at normal incidence by means of the transfer matrix method. The research also shows that the transmittance of the channel can be maximized when the number of periodic Li F/Ga Sb layers on one side of the air defect layer is equal to that of the other side. When adding a period to both sides respectively, the full width at half maximum of the defect mode is reduced by one order of magnitude. This structure will provide a promising approach to fabricate practical tunable filters in the visible region with ultra-wide tuning range.

关 键 词：photonic crystal filters transfer matrix method single resonant peak ultra-wide tuning range mechanical modulation 

分 类 号：TN713[电子电信—电路与系统]