For the surface plasmon, two kinds of two dimensional metal periodic arrays are investigated. 在表面电浆方面，我们研究两种二维的金属周期结构。
A new restricted system equivalent form is developed and the system is decomposed into two lower dimensional subsystems. 摘要首先引入一种新的受限系统等价分解形式，将所给的系统分解成两个低维的子系统。
