含左手材料的一维三元准周期光子晶体带隙特性研究

Study of Band-Structure of Quasi-Periodic 1-D Ternary Photonic Crystal with LHM

选用LiF、Si和左手材料为介质构成了一维三元光子晶体,并在考虑其色散关系和几何厚度随机误差的基础上,利用传输矩阵法,计算了该光子晶体的带隙结构。结果表明:各介质厚度的变化率相同时,主带隙的相对宽度的变化率也相同,而折射率最大的介质厚度的变化对带隙绝对宽度的影响最大。光线入射角度的变化对主带隙的绝对宽度和相对宽度的影响较小。

1D ternary photonic crystals with LHM consists of LiF, Si, and left-handed materials. Taking consideration of the dispersion relation and random error of geometric thickness, the bandgap of the photonic crystals with LHM is calculated by using transfer matrix method. The results indicate that while the change of mediums thickness is same, the same is the change of relative width of the main bandgap, but while the change of mediums thickness with the biggest refractive index has the biggest impact on the absolute width. The change of incident angle has smaller impact on the relative width and the absolute width of bandgap.