Lateral optical force modulation due to electromagnetic multipole polarization

Yue He; Xi Xie; Changjun Min; Yuquan Zhang; Xiaocong Yuan

doi:10.1117/12.3023472

18 March 2024 Lateral optical force modulation due to electromagnetic multipole polarization

Yue He, Xi Xie, Changjun Min, Yuquan Zhang, Xiaocong Yuan

Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 131043F (2024) https://doi.org/10.1117/12.3023472
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China

Abstract

Momentum is the basic physical characteristic of light, and the exchange of momentum between light and matter results in optical force. In recent years, the spin Hall effect and it induced lateral optical forces have drawn wide attentions. This work focuses on the lateral optical forces exerted on a gold particle on gold film in a horizontally incident light field, which is essentially due to the coupling effect of spin angular momentum and multipole resonance caused by symmetry breaking. In the horizontally incident circularly polarized light field, as the size of the particles increases, the polar resonance mode of the particles undergoes a transition from electric dipole, quadrupole, hexapole, and octupole mode. This process of change is accompanied by the lateral optical force increasing in the initial stage, and then decreasing till reversed into an opposite direction. This work provides new insights into the mechanism of lateral optical force generation, and offers an additional dimension for optical manipulation of micro and nano particles.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yue He, Xi Xie, Changjun Min, Yuquan Zhang, and Xiaocong Yuan "Lateral optical force modulation due to electromagnetic multipole polarization", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 131043F (18 March 2024); https://doi.org/10.1117/12.3023472

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