期刊
OPTICA
卷 7, 期 10, 页码 1341-1348出版社
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.396147
关键词
-
类别
资金
- Office of Naval Research [N00014-16-12502]
- W. M. Keck Foundation
- U.S. Department of Energy [DE-AC02-06CH11357]
The creation of optically powered self-assembling nano-to-meso-scale machines that do work is a long-standing goal in photonics. We demonstrate an optical matter (OM) machine that converts the spin angular momentum (SAM) of light into orbital angular momentum (OAM) to do mechanical work. The specific OM machine we study is based on a sixfold symmetric hexagonally ordered nanoparticle array that operates as an OM gear that is assembled and made to rotate in a circularly polarized Gaussian beam. The rotational symmetry of the OM gear leads to a selection rule for the allowed scattering modes based on their angular momentum. Electrodynamics calculations show that the collective scattering modes with the largest angular momentum scatter strongly in the transverse direction. Simulations and experiments show that the angular momentum that accompanies the scattered light causes a negative torque response on the OM gear and drives a probe particle placed outside the OM gear around the gear in an asymmetric force field analogously to Brownian ratchets. The gear-probe OM machine concept can be expanded to applications in nanofluidics and particle sorting. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据