Gradient and nongradient contributions to plasmon-enhanced optical forces on silver nanoparticles

Vance Wong, Mark A. Ratner

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44 Citations (Scopus)


We use a computational method based on the discrete-dipole approximation (DDA) to calculate the gradient and nongradient contributions to optical forces on nanometer sized silver particles in water. We find that, due to a contribution that is usually neglected, nongradient forces are often non-negligible. This result is not a consequence of an approach to the dipole limit. We suggest that this method could provide useful input for a more detailed understanding of the physics relevant to optical trapping and binding phenomena.

Original languageEnglish
Article number075416
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number7
Publication statusPublished - Feb 28 2006


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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