Center of Theoretical Physics, Department of Physics, Capital Normal University, Beijing 100048, People's Republic of China.
J Phys Condens Matter. 2011 Jan 12;23(1):015005. doi: 10.1088/0953-8984/23/1/015005. Epub 2010 Dec 6.
We investigate the mechanism of extraordinary optical transmission in subwavelength metal hole arrays. Experimental results for the arrays consisting of square or rectangular holes are well explained by the dependence of transmission strength on the polarization direction of the incident light. This polarization dependence occurs in each single hole. For a hole array, there is in addition an interplay between the adjacent holes which is caused by the transverse magnetic field of surface plasmon polaritons on the metal film surfaces. Based on the detailed study of a single-hole and two-hole structures, a simple method to calculate the total transmissivity of hole arrays is proposed.
我们研究了亚波长金属孔阵列中的异常光透射机制。由正方形或长方形孔组成的阵列的实验结果很好地解释了透射强度与入射光偏振方向的关系。这种偏振依赖性存在于每个单个孔中。对于孔阵列，还有一个相邻孔之间的相互作用，这是由金属膜表面上的表面等离子体激元的横向磁场引起的。基于对单个孔和双孔结构的详细研究，提出了一种计算孔阵列总透射率的简单方法。
