Size-selective optical forces for microspheres using evanescent wave excitation of whispering gallery modes
Optics
2011-07-28 v1
Abstract
We show that when a microsphere is illuminated by an evanescent wave, the optical forces on- and off- whispering gallery mode (WGM) resonance can differ by several orders of magnitude. Such size selective force allows one to selectively manipulate the resonating particles, while leaving those particles at off-resonance untouched. As WGM resonances have very high-Q's, this kind of force could be deployed for size-selective manipulation with a very high accuracy (~1/Q), as well as simultaneous particle-sorting according to their size or resonant frequency.
Keywords
Cite
@article{arxiv.0804.4341,
title = {Size-selective optical forces for microspheres using evanescent wave excitation of whispering gallery modes},
author = {Jack Ng and C. T. Chan},
journal= {arXiv preprint arXiv:0804.4341},
year = {2011}
}
Comments
11 pages, 2 figures