太赫兹梯度破碎金属光栅的简化建模

M. Dzyubenko, V. Radionov, V. Maslov, E. Odarenko
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引用次数: 2

摘要

给出了太赫兹梯度碎片光栅的研究结果。对梯度光栅反射和透射的波进行了电场相位的数值计算。得到了不同电场矢量方向的平面极化情况下的场相分布。偏振平面的旋转导致反射波和透射波的相位前畸变。给出了光栅所处基片对场相位空间分布的影响。相位前的曲率与反射波的凹面镜和透射波的聚焦透镜的原理图相似。因此,平面梯度结构具有凹面镜或凸面镜的功能,同时具有聚焦透镜或散射透镜的功能。这种梯度光栅可用于各种器件,特别是在太赫兹激光器的谐振器中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Simplified Modeling of Gradient Fragmented Metal Gratings of the Terahertz Range
The results of the investigation of gradient fragmented gratings in the terahertz range are presented. Numerical calculations of the electric field phase are carried out for waves reflected and transmitted by gradient grating. Field phase profiles are obtained for plane polarization cases with different directions of the electric field vector. Rotation of the polarization plane results in distortion of the phase fronts of the reflected and transmitted waves. The effect of the substrate on which the grating is located on the spatial distribution of the field phase is shown. The curvature of the phase front is similar to the schematic with a concave mirrors for reflected waves and a focusing lens for transmitted waves. Therefore a flat gradient structure acquires the functions of a concave or convex mirror and simultaneously a focusing or scattering lens. Such gradient gratings can be used in various devices, and in particular in resonators of terahertz lasers.
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