Observation of high-order imaginary Poynting momentum optomechanics in structured light
Abstract
The imaginary Poynting momentum (IPM) of light has been captivated an unusual origin of optomechanical effects on dipolar magnetoelectric particles, but yet observed in experiments. Here, we report, for the very first time, a whole family of high-order IPM forces for not only magnetoelectric but also generic Mie particles, assisted with their excited higher multipoles within. Such optomechanical phenomena derive from a nonlinear contribution of the IPM to the optical force, and can be remarkable even when the incident IPM is small. We observe the high-order optomechanics in a structured light beam with vortex-like IPM streamlines, which allows the low-order dipolar contribution to be suppressed. Our results provide the first unambiguous evidence of the ponderomotive nature of the IPM, expand the classification of optical forces and open new possibilities for optical forces and micromanipulations.
Keywords
Cite
@article{arxiv.2206.03153,
title = {Observation of high-order imaginary Poynting momentum optomechanics in structured light},
author = {Yuan Zhou and Xiaohao Xu and Yanan Zhang and Manman Li and Shaohui Yan and Manuel Nieto-Vesperinas and Baojun Li and Cheng-Wei Qiu and Baoli Yao},
journal= {arXiv preprint arXiv:2206.03153},
year = {2022}
}