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

Lehmuskero, Anni (author)
Department of Applied Physics, Chalmers University of Technology, Gothenburg, Sweden
Li, Yanming (author)
Electrical & Computer Engineering Department, NC State University, Raleigh, North Carolina, USA
Johansson, Peter, 1961- (author)
Örebro universitet,Institutionen för naturvetenskap och teknik,School of Science and Technology, Örebro University, Örebro, Sweden
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Johansson, Mikael (author)
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 (creator_code:org_t)
The Optical Society, 2014
2014
English.
In: Optics express. - : The Optical Society. - 1094-4087. ; 22:4, s. 4349-4356
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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 ħl per photon.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Keyword

plasmonics
optical forces
optical angular momentum
gold nanoparticles
Physics
Fysik

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Lehmuskero, Anni
Li, Yanming
Johansson, Peter ...
Johansson, Mikae ...
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NATURAL SCIENCES
NATURAL SCIENCES
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Optics express
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Örebro University

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