C型弯曲金属圆孔阵列的透射特性与隧穿模式
Transmission Characteristics and Tunneling Mode of C-Type Curved Metal Circular Hole Arrays
黄飞 1汪泽 1薛润玉 1王正岭1
作者信息
- 1. 江苏大学物理与电子工程学院,江苏 镇江 212013
- 折叠
摘要
为研究C型弯曲金属圆孔阵列的异常透射现象,通过模拟得到了该圆孔阵列的透射谱与电场分布,分析了C型弯曲金属圆孔阵列表面光晶格的产生及在圆孔阵列中的电场传输模式.研究发现,基于波导模式和隧穿模式的C型弯曲金属圆孔阵列存在异常透射机制,其中隧穿模式是由波导模式演化得到,最大透射率随弯曲程度的增大而下降.弯曲程度增加引起最大透射率下降的原因主要有三点:首先,C型弯曲金属圆孔阵列在最大透射率处的反射率都处于较高的水平;然后,由于金属圆孔阵列上方光晶格中的类高斯光场束腰变化及光场中心与圆孔中心的偏离导致电场耦合进入金属圆孔阵列的效率降低;最后,由于C型圆孔的弯曲效应,导致较大的电场传输损耗.
Abstract
In order to study the abnormal transmission phenomenon of C-type curved metal arrays with circular holes,the transmission spectrum and electric field distribution are obtained through experiments.The process of generating and transmitting optical lattices is analyzed for the C-type curved metal circular hole arrays.It is found that C-type curved metal circular hole arrays based on waveguide and tunneling modes exhibit anomalous transmission mechanisms,with tunneling mode evolving from waveguide mode and maximum transmission decreasing with increasing bending degree.There are three main reasons for this:first,the reflectivity of the C-type curved metal circular hole array is at a relatively high level at the maximum transmittance;second,the efficiency of electric field coupling in the metal circular hole array is reduced due to the waist variation of the light field with Gaussian like distribution in the optical lattice above the array and the deviation between the centers of the light field and circular hole;finally,the significant bending effect of C-type circular hole leads to large electric field transmission losses.
关键词
弯曲圆孔阵列/透射特性/电场分布/隧穿模式Key words
curved circular hole array/transmission characteristics/electric field distribution/tunneling mode引用本文复制引用
出版年
2024
NETL
NSTL
万方数据