Monte Carlo simulation of polarization of light back-scattered from randomly rough surfaces

IF 0.7 4区物理与天体物理 Q4 OPTICS

Optica Applicata Pub Date : 2023-01-01 DOI:10.37190/oa230105

Yuxiang Jiang, Zhenhua Li

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引用次数: 0

Abstract

Laser detection devices obtain target information from back-scattered light, such as lidar. The recognition rate can be improved by analyzing intensity and polarization of echo signal. In this paper, Monte Carlo method is used to generate a large number of randomly rough surfaces to simulate targets. Every rough surface is discretized into a large number of micro-surface elements. Stokes parameters of back-scattered light are calculated by numerical integration. Incident light is p-, s-, 45° linearly polarized light and right-hand circularly polarized light, respectively. Numerical results show that when s- and p-linearly polarized light incident on a metal rough surface, back-scattered light appears circularly polarized component. Metal rough surface resembles a wave plate with phase difference, with the fast axis parallel or perpendicular to the 45° direction. When linearly polarized light is incident on dielectric rough surface, back-scattered light has no circularly polarized component. Experimental data are consistent with the numerical results. The above research provides a new basis for laser detection device to identify metal targets from the environmental background.

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随机粗糙表面背向散射光偏振的蒙特卡罗模拟

激光探测设备通过后向散射光获取目标信息，如激光雷达。通过分析回波信号的强度和极化，可以提高识别率。本文采用蒙特卡罗方法生成大量随机粗糙表面来模拟目标。每个粗糙表面被离散成大量的微表面单元。采用数值积分法计算了后散射光的Stokes参数。入射光分别为p°、s°、45°线偏振光和右手圆偏振光。数值结果表明，当s线偏振光和p线偏振光入射到金属粗糙表面时，后向散射光呈现圆偏振分量。金属粗糙表面类似于具有相位差的波片，快速轴平行或垂直于45°方向。当线偏振光入射到介质粗糙表面时，背散射光没有圆偏振光分量。实验数据与数值结果吻合较好。上述研究为激光探测装置从环境背景中识别金属目标提供了新的依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optica Applicata 物理-光学

CiteScore

1.00

自引率

16.70%

发文量

审稿时长

4 months

期刊介绍： Acoustooptics, atmospheric and ocean optics, atomic and molecular optics, coherence and statistical optics, biooptics, colorimetry, diffraction and gratings, ellipsometry and polarimetry, fiber optics and optical communication, Fourier optics, holography, integrated optics, lasers and their applications, light detectors, light and electron beams, light sources, liquid crystals, medical optics, metamaterials, microoptics, nonlinear optics, optical and electron microscopy, optical computing, optical design and fabrication, optical imaging, optical instrumentation, optical materials, optical measurements, optical modulation, optical properties of solids and thin films, optical sensing, optical systems and their elements, optical trapping, optometry, photoelasticity, photonic crystals, photonic crystal fibers, photonic devices, physical optics, quantum optics, slow and fast light, spectroscopy, storage and processing of optical information, ultrafast optics.