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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 15 — Jul. 18, 2011
  • pp: 13922–13933

Numerical investigation of passive optical sorting of plasmon nanoparticles

M. Ploschner, M. Mazilu, T. Čižmár, and K. Dholakia  »View Author Affiliations

Optics Express, Vol. 19, Issue 15, pp. 13922-13933 (2011)

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We explore the passive optical sorting of plasmon nanoparticles and investigate the optimal wavelength and optimal beam shape of incident field. The condition for optimal wavelength is found by maximising the nanoparticle separation whilst minimising the temperature increase in the system. We then use the force optical eigenmode (FOEi) method to find the beam shape of incident electromagnetic field, maximising the force difference between plasmon nanoparticles. The maximum force difference is found with respect to the whole sorting region. The combination of wavelength and beam shape study is demonstrated for a specific case of gold nanoparticles of radius 40nm and 50nm respectively. The optimum wavelength for this particular situation is found to be above 700nm. The optimum beam shape depends upon the size of sorting region and ranges from plane-wave illumination for infinite sorting region to a field maximising gradient force difference in a single point.

© 2011 OSA

OCIS Codes
(200.4880) Optics in computing : Optomechanics
(350.4855) Other areas of optics : Optical tweezers or optical manipulation
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: May 11, 2011
Revised Manuscript: June 17, 2011
Manuscript Accepted: June 19, 2011
Published: July 6, 2011

Virtual Issues
Vol. 6, Iss. 8 Virtual Journal for Biomedical Optics

M. Ploschner, M. Mazilu, T. Čižmár, and K. Dholakia, "Numerical investigation of passive optical sorting of plasmon nanoparticles," Opt. Express 19, 13922-13933 (2011)

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