Quantitative force mapping of an optical vortex trap

Yiqiong Zhao, Graham Milne, J. Scott Edgar, Gavin D. M. Jeffries, David McGloin, Daniel T. Chiu

    Research output: Contribution to journalArticlepeer-review

    23 Citations (Scopus)

    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 languageEnglish
    Article number161111
    Pages (from-to)-
    Number of pages3
    JournalApplied Physics Letters
    Volume92
    Issue number16
    DOIs
    Publication statusPublished - 21 Apr 2008

    Keywords

    • INDEX MICROPARTICLES
    • DIELECTRIC SPHERE
    • BEAMS
    • POLARIZATION
    • DIFFRACTION
    • PARTICLES
    • SYSTEMS
    • REGIME
    • FIELD

    Cite this