Analysis on scattering and inner near-field characteristics of a uniaxial anisotropic sphere by an off-axis high-order Bessel (vortex) beam
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View abstract on PubMed
Summary
This summary is machine-generated.This study introduces a theoretical approach for analyzing light scattering from anisotropic spheres using high-order Bessel vortex beams. It details how beam properties and particle characteristics influence scattering, offering insights for optical applications.
Area Of Science
- * Electromagnetics and Optics
- * Theoretical Physics
Background
- * Light scattering phenomena are crucial in understanding wave-matter interactions.
- * Anisotropic materials exhibit unique optical properties influencing scattering behavior.
- * High-order Bessel vortex beams (HOBVBs) offer controlled illumination for advanced optical studies.
Purpose Of The Study
- * To develop a theoretical framework for scattering of uniaxial anisotropic spheres by off-axis HOBVBs.
- * To analyze the impact of HOBVB parameters and particle properties on scattering characteristics.
- * To investigate unique internal and near-field distributions under HOBVB illumination.
Main Methods
- * Generalized Lorenz-Mie theory (GLMT) combined with the Fourier transform method.
- * Derivation of concise expansion coefficients for off-axis HOBVBs using spherical vector wave functions (SVWFs).
- * Detailed analysis of scattering parameters including radar cross-section (RCS), efficiencies, and asymmetric factor.
Main Results
- * A method to effectively reconstruct HOBVBs with all conical angles is presented.
- * Differences in scattering are shown for on-axis vs. off-axis HOBVB and plane wave illumination.
- * Influences of topological charge, conical angle, particle size, and off-axis distance are quantified.
Conclusions
- * The study provides a comprehensive understanding of scattering from uniaxial anisotropic spheres by HOBVBs.
- * Findings offer insights into Bessel beam-matter interactions.
- * Potential applications include optical propagation, micromanipulation, and near-field measurements.
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