Optical Force Effects of Rayleigh Particles by Cylindrical Vector Beams

Author:

Zhao Yuting1,Zhou Liqiang1,Jiang Xiaotong1,Zhu Linwei1,Shi Qiang12

Affiliation:

1. School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China

2. Moji-Nano Technology Co., Ltd., Yantai 264006, China

Abstract

High-order cylindrical vector beams possess flexible spatial polarization and exhibit new effects and phenomena that can expand the functionality and enhance the capability of optical systems. However, building a general analytical model for highly focused beams with different polarization orders remains a challenge. Here, we elaborately develop the vector theory of high-order cylindrical vector beams in a high numerical aperture focusing system and achieve the vectorial diffraction integrals for describing the tight focusing field with the space-variant distribution of polarization orders within the framework of Richards–Wolf diffraction theory. The analytical formulae include the exact three Cartesian components of electric and magnetic distributions in the tightly focused region. Additionally, utilizing the analytical formulae, we can achieve the gradient force, scattering force, and curl-spin force exerted on Rayleigh particles trapped by high-order cylindrical vector beams. These results are crucial for improving the design and engineering of the tightly focused field by modulating the polarization orders of high-order cylindrical vector beams, particularly for applications such as optical tweezers and optical manipulation. This theoretical analysis also extends to the calculation of complicated optical vortex vector fields and the design of diffractive optical elements with high diffraction efficiency and resolution.

Funder

National Natural Science Foundation of China

Program of Science and Technology Development of Yantai

Project of Taishan industry leading talents

Publisher

MDPI AG

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