Work

Non-paraxial pin-like optical beams: geometric design and pulling forces

Year: 2025

Type: article

Abstract: We demonstrate non-paraxial pin-like optical beams and further report their mechanical features during their interactions with particles. These beams are designed by using a geometric method, followed by the discovered mechanism of their formation in terms of optical rays. They exhibit a progressively narrowing of their main intensity lobe along the propagation distance in the range of several micrometers. In momentum space, the phase of these beams is obtained via a correspondence between real and Fourier spaces, and the amplitude is found to preferably locate at higher spatial frequencies. Based on this angular spectral information, the longitudinal forces felt by particles placed in a pin-like optical beam imparted with radial polarizations are calculated, and pulling forces are found for specific particle size and propagation distance ranges.

Source: Optics Express

DOI: 10.1364/oe.572065

Authors: Qing Guo, Qianqian Kang, Xuejing Zhang, Xiaobin Peng, Hao Wu, Yi Hu

Institution: Sichuan Normal University

Language: English

Topic: Orbital Angular Momentum in Optics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: National Natural Science Foundation of China, Higher Education Discipline Innovation Project