We study the scattering of a linearly polarized electromagnetic plane wave by a two-dimensional random slightly rough surface separating the vacuum from a chiral medium. We implement the first-order small perturbation method (SPM) and the first-order small slope approximation (SSA) and determine the analytical expressions of the coherent and incoherent intensities. The effects of chirality on the polarization of the wave scattered within the vacuum are analyzed. The coherent intensity has a cross-polarized component as well as the incoherent intensity in the incidence plane. We show that there are configurations for which a total polarization coupling occurs with the co-polarized incoherent intensity equal to zero.

中文翻译：

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从稍微粗糙的手性表面散射：使用小扰动方法和小斜率逼近进行分析

我们研究了将真空与手性介质分开的二维随机稍微粗糙的表面对线性极化电磁平面波的散射。我们执行一阶小扰动方法（SPM）和一阶小斜率逼近（SSA），并确定相干强度和非相干强度的解析表达式。分析了手性对在真空中散射的波的极化的影响。相干强度以及入射平面中的非相干强度具有交叉极化的分量。我们表明，存在一些配置，其中总极化耦合发生且同极化非相干强度等于零。