Doped Modes of SiO_2/CdSe One-dimensional Photonic Crystal with LiTaO_3 in Visible Region
可见光波段SiO_2/CdSe一维光子晶体及缺陷模的研究

In this paper SiO2 and CdSe were used to construct one-dimensional photonic crystal in visible region, including the introduction of LiTaO3 defect layer. The formation of photonic band gaps is exhibited and confirmed by a calculation of the transfer matrix method (TMM).There become defect modes in the photonic forbidden band gap compare with the photonic crystals without defects.The position,amount and reflection properties of the defect modes are related with not only the form of defect but also the thickness of defect and periodicity of photonic crystals. It is shown that the variety of the width of impure layer in one-dimensional photonic crystal and the periods number layers of photonic crystal could alter the transmission,the location and numbers of photonic defect mode.When the thickness of LiTaO3 inserts layer is regulated properly,for instance,the defect module could be appeared on red light,yellow light area of visible region.The structure should enable new applications for designing photonic crystal devices.