Plasmonic particles set into fast orbital motion by an optical vortex beam

被引：66
|
作者：
Lehmuskero, Anni [1 ]
Li, Yanming [2 ]
Johansson, Peter [1 ,3 ]
Kall, Mikael [1 ]
机构：
[1] Chalmers, Dept Appl Phys, S-41296 Gothenburg, Sweden
[2] N Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27695 USA
[3] Univ Orebro, Sch Sci & Technol, S-70182 Orebro, Sweden
来源：
OPTICS EXPRESS | 2014年 / 22卷 / 04期
基金：
瑞典研究理事会; 美国国家科学基金会;
关键词：
ANGULAR-MOMENTUM; METAL NANOPARTICLES; LIGHT-BEAM; DRIVEN; ROTATION; PHASE;
D O I：
10.1364/OE.22.004349
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We optically trap plasmonic gold particles in two dimensions and set them into circular motion around the optical axis using a helically phased vortex laser beam. The orbiting frequency of the particles reaches 86 Hz, which corresponds to a particle velocity of the order 1 mm per second, for an incident laser power of a few tens of milliwatts. The experimentally determined orbiting frequencies are found to be well in line with the notion that the beam carries an orbital angular momentum of hl per photon. (C) 2014 Optical Society of America
引用
收藏
页码：4349 / 4356
页数：8
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