Quantitative force mapping of an optical vortex trap.
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.
Zhao
Yiqiong
Y
Milne
Graham
G
Edgar
J Scott
JS
Jeffries
Gavin D M
GD
McGloin
David
D
Chiu
Daniel T
DT