Light-induced rotation of dielectric microparticles around an optical nanofiber

被引：41

作者：

Tkachenko, Georgiy ^{[1
]}

Toftul, Ivan ^{[2
]}

Esporlas, Cindy ^{[1
]}

Maimaiti, Aili ^{[1
,3
,4
]}

Le Kien, Fam ^{[1
]}

Viet Giang Truong ^{[1
]}

Chormaic, Sile Nic ^{[1
,5
]}

机构：

[1] Okinawa Inst Sci & Technol, Grad Univ, Onna, Okinawa 9040495, Japan

[2] ITMO Univ, Dept Phys & Engn, Kronverkskiy Prospekt 49, St Petersburg 197101, Russia

[3] Univ Coll Cork, Dept Phys, Cork, Ireland

[4] Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden

[5] Univ Grenoble Alpes, CNRS, Grenoble INP, Inst Neel, F-38000 Grenoble, France

来源：

OPTICA | 2020年 / 7卷 / 01期

基金：

日本学术振兴会; 奥地利科学基金会; 俄罗斯基础研究基金会;

关键词：

FIELD; FIBERS; SPHERE;

D O I：

10.1364/OPTICA.374441

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Evanescent electromagnetic fields near a waveguide can exert a transverse radiation force on scattering objects. To prove this experimentally, we demonstrate light-induced orbiting of isotropic, dielectric microparticles around an optical nanofiber that guides elliptically polarized, fundamental modes. The orbit frequency is proportional to the helicity of the coupled light. Interestingly, the observed motion is opposite to the energy flow circulation around the fiber. This result verifies the theoretically predicted negative optical torque on a sufficiently large particle in the vicinity of a nanofiber. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：59 / 62

页数：4

共 36 条

[1] Radiation forces on a micrometer-sized sphere in an evanescent field [J].