Laser beam carrying orbital angular momentum scattering from a particle: Near-field intensity and phase numerical study

IF 2.3 3区 物理与天体物理 Q2 OPTICS Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-09-14 DOI:10.1016/j.jqsrt.2024.109192
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Abstract

The interaction of the light carrying orbital angular momentum (OAM) with a single spherical particle is explored using a commercial multi-physics simulation platform. The scattering of light with wavelength of 0.532 µm from an ice particle is presented. The research focuses on studying the light-matter interface within an observation volume of radius 10 times the wavelength (5.32 µm) and present near-field magnitude and phase of the scattered field. We place the particle at the various locations of a Gaussian beam, as well as move it to through the vortex and annulus of the light that carries OAM with topological charges of 1, 2 and 3. The numerical solutions showcase the variations of the scattering field complex values and provide a valuable insight in the field behaviour near and inside the particle for different illumination. We show two and three-dimensional scattering field magnitude and phase spatial distributions and their correlations.

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携带轨道角动量的激光束从粒子散射:近场强度和相位数值研究
利用商用多物理场仿真平台探讨了携带轨道角动量(OAM)的光与单个球形粒子的相互作用。研究介绍了波长为 0.532 µm 的光从冰颗粒上散射的情况。研究重点是研究半径为波长(5.32 微米)10 倍的观测体积内的光-物质界面,以及散射场的近场幅度和相位。我们将粒子放置在高斯光束的不同位置,并使其穿过带有拓扑电荷为 1、2 和 3 的 OAM 的光涡旋和环面。数值解展示了散射场复值的变化,并为了解不同光照下粒子附近和内部的场行为提供了宝贵的见解。我们展示了二维和三维散射场幅度和相位空间分布及其相关性。
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来源期刊
CiteScore
5.30
自引率
21.70%
发文量
273
审稿时长
58 days
期刊介绍: Papers with the following subject areas are suitable for publication in the Journal of Quantitative Spectroscopy and Radiative Transfer: - Theoretical and experimental aspects of the spectra of atoms, molecules, ions, and plasmas. - Spectral lineshape studies including models and computational algorithms. - Atmospheric spectroscopy. - Theoretical and experimental aspects of light scattering. - Application of light scattering in particle characterization and remote sensing. - Application of light scattering in biological sciences and medicine. - Radiative transfer in absorbing, emitting, and scattering media. - Radiative transfer in stochastic media.
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