几何横向比例对金属孔阵列强透射特性的影响

Effect of Horizontal Proportion of Geometry on Extraordinary Transmission Characteristics of Metal Hole Array

摘要:

设计了三种不同的几何横向比例(孔直径与晶格间距的比值)来研究其对金/二氧化硅/硅圆孔阵列组成的光子晶体强透射特性的影响。采用平面波展开法模拟了在三个不同的几何横向比例(0.4;0.5;0.6)条件下硅光子晶体的光子带隙。理论模拟结果发现比例为0.5、由正三角形晶格组成的硅光子晶体能够得到一个较好的具有两个宽带隙且大的中间频率的光子带隙。采用微机电(MEMS)技术制作了比例分别为0.4、0.5和0.6的正三角形晶格圆孔阵列组成的金/二氧化硅/硅光子晶体,利用傅里叶变换红外光谱仪测量其反射光谱。实验结果表明,比例为0.5时,该结构能够获得较强的光透射增强效果和较窄的透射峰。

Abstract:

Three different horizontal proportions of geometry(the ratio of hole diameter to lattice spacing) are designed to investigate the effect of different proportions on extraordinary transmission characteristics of the photonic crystal combined with gold/silicon dioxide/silicon round holes array.The plane wave expansion method is used to simulate the photonic band gap of silicon photonic crystal under the conditions of three different horizontal ratios of geometry(0.4;0.5;0.6).For silicon photonic crystal combi...