Send to

Choose Destination
See comment in PubMed Commons below
Opt Lett. 2005 Nov 15;30(22):3039-41.

Interactions between spherical nanoparticles optically trapped in Laguerre-Gaussian modes.

Author information

  • 1Nanostructures and Photomolecular Systems, School of Chemical Sciences, University of East Anglia, Norwich, UK.


When a Laguerre-Gaussian (LG) laser mode is used to trap nanoparticles, the spatial disposition of the particles about the beam axis is determined by a secondary mechanism that engages the input radiation with the interparticle potential. This analysis, based on the identification of a range-dependent laser-induced energy shift, elicits and details features that arise for spherical nanoparticles irradiated by a LG mode. Calculations of the absolute minima are performed for LG beams of variable topological charge, and the results are displayed graphically. It is shown that more complex ordered structures emerge on extension to three- and four-particle systems and that similar principles will apply to other kinds of radially structured optical mode.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Optical Society of America
    Loading ...
    Write to the Help Desk