Optical trapping of absorbing particles
Optics
2007-05-23 v1
Abstract
Radiation pressure forces in a focussed laser beam can be used to trap microscopic absorbing particles against a substrate. Calculations based on momentum transfer considerations show that stable trapping occurs before the beam waist, and that trapping is more effective with doughnut beams. Such doughnut beams can transfer angular momentum leading to rotation of the trapped particles. Energy is also transferred, which can result in heating of the particles to temperatures above the boiling point of the surrounding medium.
Cite
@article{arxiv.physics/0310022,
title = {Optical trapping of absorbing particles},
author = {H. Rubinsztein-Dunlop and T. A. Nieminen and M. E. J. Friese and N. R. Heckenberg},
journal= {arXiv preprint arXiv:physics/0310022},
year = {2007}
}
Comments
13 pages, 11 figures