Plasmonic particles set into fast orbital motion by an optical vortex beam WARI SC, 1992, JOURNAL OF MODERN OPTICS, V39, P1097
Artikel i vetenskaplig tidskrift, 2014

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

METAL NANOPARTICLES

PHASE

ROTATION

LIGHT-BEAM

DRIVEN

ANGULAR-MOMENTUM

Författare

Anni Lehmuskero

Chalmers, Teknisk fysik, Bionanofotonik

Y. M. Li

North Carolina State University

Peter Johansson

Chalmers, Teknisk fysik, Bionanofotonik

Mikael Käll

Chalmers, Teknisk fysik, Bionanofotonik

Optics Express

1094-4087 (ISSN)

Vol. 22 4 4349-4356

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1364/oe.22.004349