Open AccessThe properties of gold nanospheres studied with dark field optical trapping
Author(s) -
Ling Lin,
Lu Huang,
Jinxin Fu,
Honglian Guo,
Jiafang Li,
H. Daniel Ou-Yang,
Zhiyuan Li
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.006618
Subject(s) - trapping , optical tweezers , materials science , scattering , coupling (piping) , dark field microscopy , colloidal gold , light scattering , optics , molecular physics , nanoparticle , optoelectronics , nanotechnology , physics , microscopy , ecology , metallurgy , biology
We demonstrate trapping and characterization of multiple gold nanospheres with a setup composed of dark field imaging and optical tweezers. The number of trapped nanospheres is quantified by the overall dark-field scattering intensity. The spectra of the scattering intensity show that there is no interparticle coupling among trapped nanospheres when the density of nanospheres in the trap is low enough (less than 10 particles), while the density of nanosphere increases the interparticle coupling of nanospheres becomes obvious. In addition, the trapping potential of a single gold nanosphere is obtained by trapping an ensemble of gold nanospheres.