厄米-高斯光束通过正弦和矩形浮雕光栅传输特性的比较研究

使用严格的傅里叶模式理论和反射-透射系数矩阵递推算法(RTCM)，对不同阶数的厄米-高斯光束通过特征尺寸与波长可比拟的正弦和矩形浮雕光栅中的传输特性做了详细的研究和比较.结果表明，入射光束的初始场分布和浮雕光栅的结构影响浮雕光栅内的光强分布.矩形浮雕光栅对光束匀滑效果优于正弦形浮雕光栅.

A comparative study of propagation properties of Hermite-Gaussian beams through gratings with sinusoidal and rectangular reliefs

By using the rigorous Fourier's modal theory and recursion algorithm of the reflection-transmission coefficient matrix(RTCM), the propagation of Hermite-Gaussian beams of different orders through gratings with sinusiodal and rectangular reliefs whose characteristic size is comparable with the wavelength, are studied and compared in detail. It is shown that the field distribution of incident beam and the structure of grating relief affect intensity distributions within the gratings. Better beam smoothing is achieved by using the rectangular-reliefed grating than using the sinusoidal-reliefed grating.