Open AccessOptics of metal nanoparticle aggregates with light induced motion
Author(s) -
Vladimir P. Drachev,
S. V. Perminov,
S. G. Rautian
Publication year - 2007
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.15.008639
Subject(s) - optics , light scattering , nanosecond , materials science , scattering , light intensity , light beam , absorption (acoustics) , nanoparticle , molecular physics , physics , nanotechnology , laser
Light-induced forces between metal nanoparticles change the geometry of the aggregates and affect their optical properties. Light absorption, scattering and scattering of a probe beam are numerically studied with Newton's equations and the coupled dipole equations for penta-particle aggregates. The relative changes in optical responses are large compared with the linear, low-intensity limit and relatively fast with nanosecond characteristic times. Time and intensity dependencies are shown to be sensitive to the initial potential of the aggregation forces.