Dr. Meng-Xin Zhao Profile

Dr. Meng-Xin Zhao

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Proceedings Article | 5 December 2024 Paper

Scattering characteristics of the inner field in chiral multilayer spherical structures under the action of a zero-order Bessel beam

Meng-Xin Zhao, Jing Bai, Wen-Hao Ma, Cheng-Xian Ge, Zhen-Sen Wu

Proceedings Volume 13418, 1341804 (2024) https://doi.org/10.1117/12.3039413

KEYWORDS: Optical spheres, Electric fields, Laser scattering, Bessel beams, Electromagnetic scattering, Spherical lenses, Particles, Multilayers, Electromagnetism, Light scattering

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This paper investigates the internal field scattering of multilayered chiral spherical particles by a zero- order Bessel beam. Based on the Generalized Lorenz-Mie Theory (GLMT). An expression for the internal field of chiral spheres with multilayer structure at incidence of a zero-order Bessel beam is derived by Sphere Vector Wave Function (SVWFS). Using the iterative method for multilayered sphere scattering, the internal field coefficients for each region within the multilayered chiral spheres were obtained. A detailed analysis was conducted about the Bessel beam’ cone angle and chiral value of each part of the multilayered spheres on the total internal electric field and polarization components. The results indicate that as the cone angle increases, the total internal electric field of the multilayered chiral spheres gradually decreases, with the maximum electric field intensity shifting toward the center of the sphere. As the chiral parameter of the outer layer increases, the total internal electric field intensity within the chiral sphere first increases and then decreases. With the increase of the chiral parameter of the inner layer, the distribution range of the maximum electric field intensity becomes narrower. The findings of this study provide theoretical insights into the internal field scattering characteristics of chiral multilayered particles, which are of significant value for the optical manipulation of chiral multilayered particles.

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