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利用传输矩阵法理论,研究二元级联结构一维光子晶体的反射谱,结果表明:随着介质层物理厚度增大,单块光子晶体(单级)的全反射带带宽增大,并伴随蓝移现象;当光子晶体为级联结构时,其全反射带迅速向长波方向展宽,而且级联数目越多,全反射带展宽速度越快;随着入射角的增大,级联结构光子晶体的全反射带带宽迅速向短波方向展宽,并伴随缓慢红移现象。二元级联结构一维光子晶体的反射谱特性及其调制规律,为光子晶体设计新型全向反射镜和光学开关等器件提供理论依据。
Using the theory of transfer matrix method, the reflection spectra of one-dimensional photonic crystals in binary cascaded structure are studied. The results show that the bandwidth of total reflection band of single photonic crystal (single-stage) increases with the increase of the physical thickness of dielectric layer, Blue shift phenomenon. When the photonic crystal is a cascade structure, its total reflection band broadens rapidly toward the long wave direction, and the more the cascade number is, the faster the total reflection band spreads. As the incident angle increases, the cascaded structure photons The bandwidth of the total reflection band of the crystal rapidly broadens to the shortwave and is accompanied by a slow redshift phenomenon. Binary cascade structure of the one-dimensional photonic crystal reflection spectrum characteristics and modulation rules for the photonic crystal design of new omnidirectional mirrors and optical switches and other devices provide a theoretical basis.