摘要
提出了一种二维光子晶体偏振分光镜的设计方法 ,介绍了光栅基板上用Ge BaF2 多层膜实现二维光子晶体偏振分光镜的优化设计 .结果表明 ,TE模式的光子禁带宽度为 0 . 0 83(2πc a ,a是光栅的周期 ) ,设计的偏振波长从1 .72 μm到 2 . 4 μm ,相对带宽为 33 .1% .此光子晶体偏振器件制作简单 ,具有实用性 .
A method for designing two-dimensional photonic crystal polarization splitters, is put forward. Optimal structure of a two-dimensional photonic crystal with a triangular lattice of Ge rectanglular rods in BaF2 is presented. It is shown how a maximum photonic band-gap for TE mode is obtained by choosing the proper width of the rectangular rods. The two-dimensional bandgap for TE mode of this design is 0.083(2π c/a, here a is the period of grating). The polarization frequency band corresponds to a wavelength band ranging from 1.72 to 2.4 μ m, with the theoretical relative bandwidth being 33.1%. The fabrication of such a photonic crystal polarization splitter is an easy process based on coating films on the grating and is suitable for industrial making.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期2358-2363,共6页
Acta Physica Sinica
基金
国家自然科学基金 (批准号 :60 4780 3 8)资助的课题 .~~
