Velocity distribution of gold nanoparticles trapped on an optical waveguide
Hole, John Patrick, Wilkinson, James S, Grujic, Katarina and Hellesø, Olav Gaute (2005) Velocity distribution of gold nanoparticles trapped on an optical waveguide. Optics Express, 13, (10), 3896-3901. (doi:10.1364/OPEX.13.003896).
The velocity distributions of 250nm diameter gold nanospheres trapped in the evanescent fields of optical waveguides are studied. The automated analysis of a large number of particles and temporal frames is described. It is used to show that the envelope of the particles' speed follows the mode intensity profile of the evanescent field along a length of the waveguide and across its width. Modal beating in a dual-moded waveguide is mapped by analysis of nanoparticle distributions above the waveguide. A modal power of ~150mW at λ=1066nm in a Cs+ ion-exchanged monomode waveguide results in speeds of up to 500μm/s.
|Keywords:||image processing, image analysis, integrated optics, integrated optics devices, lasers and laser optics, trapping, optical devices, waveguides|
|Subjects:||Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
|Divisions:||University Structure - Pre August 2011 > Optoelectronics Research Centre
|Date Deposited:||07 Mar 2006|
|Last Modified:||06 Aug 2015 02:20|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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