Abstract
We propose nonlinear resonant laser manipulation, a technique that drastically enhances the number of degrees of freedom when manipulating nano-objects. Considering the high laser intensity required to trap single molecules, we calculate the radiation force exerted on a molecule in a focused laser beam by solving the density matrix equations using the nonperturbative method. The results coherently elucidate certain recently reported puzzling phenomena that contradict the conventional understanding of laser trapping. Further, we demonstrate unconventional forms of laser manipulations using “stimulated recoil force” and “subwavelength laser manipulation.”
- Received 4 May 2011
DOI:https://doi.org/10.1103/PhysRevLett.109.087402
© 2012 American Physical Society
Focus
How to Manipulate Nanoparticles with Lasers
Published 24 August 2012
Theorists explain how a new generation of laser tractor beams can manipulate nanoparticles with unprecedented dexterity and precision.
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