一维Au/MgF2光子晶体的透射性质

理论上研究了一维金属/电介质光子晶体的透射率性质，用传输矩阵方法数值计算了Au/MgF2光子带隙晶体的透射率．发现周期性结构产生的透射共振会大幅度增加光通过层状金属的透射率．通过调节一维Au/MgF2光子晶体中金和氟化镁的厚度以及周期数，得到了可见波段的高透射允带，透射率在0.4以上，而对于可见波段以外的频率几乎是完全不能传输的．这种结构在保持了高透射率的前提下还具有金属的优点，这在传感器、护目装置、反射窗、液晶显示等诸多领域都有很大的实用价值．

Transmission Properties of One-dimensional Au/MgF2 Metallodielectric Photonic Crystals

The transmission properties of one-dimensional metallodielectric photonic crystals are studied theoretically. The matrix transfer method is used to numerically simulate the transmission through the structure. The result shows that transmission resonances can increase the transmission dramatically and reduce the absorption in a certain extent. By selecting the thickness of Au and MgF2 layers and the periods number properly,a pass band whose transmission is above 0.4 in the visible range is obtained and light can hardly pass the structure in other frequency ranges. The structure has high transmission and metal's ad-vantages,so it can be used in many fields as sensor,eye protection devices,heat reflecting windows and liquid crystal displays.