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Phys Rev Lett. 2012 Jan 13;108(2):026801. Epub 2012 Jan 11.

Plasmonic coherent drive of an optical trap.

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  • 1ISIS, University of Strasbourg and CNRS, Strasbourg, France.

Abstract

We demonstrate that optical trapping can be driven by delocalized surface plasmon modes resonantly excited within a standing wave trap. Dynamical modifications are shown to be determined by the near-field symmetry of the plasmonic modes with negligible thermal effect. With low trapping powers and polarization control, remarkable stiffness enhancements are recorded, the larger the smaller the particle. The results can be simply modeled accounting for a coherent interaction between the plasmon field and the Gaussian standing wave of the trap.

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