TY  - JOUR
TI  - Evanescent wave optical binding forces on spherical microparticles
AV  - public
SP  - 4042
VL  - 40
Y1  - 2015/09/01/
EP  - 4045
IS  - 17
N1  - Copyright © 2015 Optical Society of America.
N2  - In this Letter, we demonstrate stable optical binding of spherical microparticles in counter-propagating evanescent optical fields formed by total reflection at a dielectric interface. The microspheres are observed to form one-dimensional chains oriented parallel to the direction of propagation of the beams. We characterize the strength of the optical binding interaction by measuring the extent of Brownian position fluctuations of the optically bound microspheres and relating this to a binding spring constant acting between adjacent particles. A stronger binding interaction is observed for particles near the middle of the chain, and the dependence of the binding strength on incident laser power and number of particles in the chain is determined.
ID  - discovery1474707
UR  - http://dx.doi.org/10.1364/OL.40.004042
SN  - 1539-4794
JF  - Optics Letters
A1  - Han, X
A1  - Jones, PH
ER  -