Optical vortex trap for resonant confinement of metal nanoparticles.

@article{Dienerowitz2008OpticalVT,
  title={Optical vortex trap for resonant confinement of metal nanoparticles.},
  author={Maria Dienerowitz and Michael Mazilu and Peter J. Reece and Thomas F. Krauss and Kishan Dholakia},
  journal={Optics express},
  year={2008},
  volume={16 7},
  pages={
          4991-9
        }
}
The confinement and controlled movement of metal nanoparticles and nanorods is an emergent area within optical micromanipulation. In this letter we experimentally realise a novel trapping geometry near the plasmon resonance using an annular light field possessing a helical phasefront that confines the nanoparticle to the vortex core (dark) region. We interpret our data with a theoretical framework based upon the Maxwell stress tensor formulation to elucidate the total forces upon nanometric… CONTINUE READING

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