为了在理想的光频范围内扩展硅太阳能电池的低反射特性，设计了一种由方柱形粒子周期排列构成的光学微结构，根据等效介质理论分析了方柱形粒子高度、占空比对反射率的影响。利用所得结论合理选择方柱形粒子的尺寸，使用MEEP仿真软件建立了结构模型并进行了仿真。结果表明：该光学微结构在理想的光频范围内具有超低反射特性。

In order to expand the low reflective properties of silicon solar cells in a perfect frequency range, a kind of optical microstructures composed of period arranged square pillar was designed. On the base of the effective medium theory, the reflectivity of silicon solar cells changing with the pillar′s altitude and duty cycle was studied. Then, a structural model was set by simulation software "MEEP". The results of the simulated research demonstrate that the optical microstructures can very effectively reduce the reflection in a perfect optical frequency range.