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

24 Citations (Scopus)


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.

Original languageEnglish
Article number161111
JournalApplied Physics Letters
Issue number16
Publication statusPublished - 2008


Dive into the research topics of 'Quantitative force mapping of an optical vortex trap'. Together they form a unique fingerprint.

Cite this