Abstract
This paper describes the quantitative force mapping of micron-sized particles held in an optical vortex trap. We present a simple and efficient model, which accounts for the diffraction of the strongly localized optical field of the tightly focused laser beam, the spherical aberration introduced by the dielectric glass-to-water interface, employs the multidipole approximation for force calculations, and is able to reproduce, with quantitative agreement, the experimentally measured force map. (c) 2008 American Institute of Physics.
Original language | English |
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Article number | 161111 |
Pages (from-to) | - |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 92 |
Issue number | 16 |
DOIs | |
Publication status | Published - 21 Apr 2008 |
Keywords
- INDEX MICROPARTICLES
- DIELECTRIC SPHERE
- BEAMS
- POLARIZATION
- DIFFRACTION
- PARTICLES
- SYSTEMS
- REGIME
- FIELD