仿造蝉翼凸起状结构，建立了硅纳米锥模型，在此基础上研究其减反射及陷光性能与其底部直径、高度的关系，确定直径150 nm、高度500 nm为其最优结构参数，该参数的纳米锥结构在300~1200 nm波段平均反射率为1%。将优化的纳米锥结构与平板结构以及相同参数的纳米柱结构进行了比较，从反射曲线、电场强度分布、能量吸收密度分布、电子生成速度分布多个角度证实了纳米锥结构优异的减反射及陷光性能，为硅基光伏器件减反射陷光微结构设计提供了参考。

The silicon nanocone structure bio-inspired from the protuberances on the cicada wing is studied for its anti-reflection and light-trapping property. The average reflectivity of the nanocone can be reduced to 1% in the spectral range of from 300 nm to 1200 nm with optimal parameters of 150 nm bottom radius and 500 nm height. The optimized nanocone structure is compared with the slab structure and nanorods structure with the same parameters. The superior anti-reflection and absorption properties are further demonstrated by reflection curve, electrical field intensity distribution, absorption per unit volume and electron generation rate distribution. The simulation result may provide guidance for the design of anti-reflection and light-trapping microstructure in silicon photovoltaic devices.