swan模型中关于绕射性质的描述和功能使用，绕射参数设置是否得当跟模型网格的大小，周期都有一定关系，如果设置不合理将引起模型发散。

A phase-diffractive optical element is designed to measure the topological charge of optical vortices. We use the scalar diffraction theory to calculate the far-field diffraction patterns. The simulation results show that almost all of the power of t

The novel vertically standing PtSe2 film on transparent quartz was prepared by selenization of platinum film deposited by the magnetron sputtering method, and an Nd:LuVO4 passively mode-locked solid-state laser was realized by using the fabricated Pt