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Scattering Characteristics of a Circularly Polarized Bessel Pincer Light-Sheet Beam Interacting with a Chiral Sphere of Arbitrary Size.

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Title: Scattering Characteristics of a Circularly Polarized Bessel Pincer Light-Sheet Beam Interacting with a Chiral Sphere of Arbitrary Size.
Authors: Zhang, Shu, Chen, Shiguo, Wei, Qun, Li, Renxian, Wei, Bing, Song, Ningning
Source: Micromachines; Aug2025, Vol. 16 Issue 8, p845, 23p
Subject Terms: SCATTERING (Physics), CIRCULAR polarization, CHIRALITY element, HIGH resolution imaging, MIE scattering, BESSEL beams, OPTICAL control
Abstract: The scattering interaction between a circularly polarized Bessel pincer light-sheet beam and a chiral particle is investigated within the framework of generalized Lorenz–Mie theory (GLMT). The incident electric field distribution is rigorously derived via the vector angular spectrum decomposition method (VASDM), with subsequent determination of the beam-shape coefficients (BSCs) p m n u and q m n u through multipole expansion in the basis of vector spherical wave functions (VSWFs). The expansion coefficients for the scattered field ( A m n s B m n s ) and interior field ( A m n B m n ) are derived by imposing boundary conditions. Simulations highlight notable variations in the scattering field, near-surface field distribution, and far-field intensity, strongly influenced by the dimensionless size parameter k a , chirality κ , and beam parameters (beam order l and beam scaling parameter α 0 ). These findings provide insights into the role of chirality in modulating scattering asymmetry and localization effects. The results are particularly relevant for applications in optical manipulation and super-resolution imaging in single-molecule microbiology. [ABSTRACT FROM AUTHOR]
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Abstract:The scattering interaction between a circularly polarized Bessel pincer light-sheet beam and a chiral particle is investigated within the framework of generalized Lorenz–Mie theory (GLMT). The incident electric field distribution is rigorously derived via the vector angular spectrum decomposition method (VASDM), with subsequent determination of the beam-shape coefficients (BSCs) p m n u and q m n u through multipole expansion in the basis of vector spherical wave functions (VSWFs). The expansion coefficients for the scattered field ( A m n s B m n s ) and interior field ( A m n B m n ) are derived by imposing boundary conditions. Simulations highlight notable variations in the scattering field, near-surface field distribution, and far-field intensity, strongly influenced by the dimensionless size parameter k a , chirality κ , and beam parameters (beam order l and beam scaling parameter α 0 ). These findings provide insights into the role of chirality in modulating scattering asymmetry and localization effects. The results are particularly relevant for applications in optical manipulation and super-resolution imaging in single-molecule microbiology. [ABSTRACT FROM AUTHOR]
ISSN:2072666X
DOI:10.3390/mi16080845