Open AccessDispersion of nonlinear dielectric function of Au nanoparticles in silica glass
Author(s) -
Yoshihiko Takeda,
О.А. Plaksin,
Naoki Kishimoto
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.15.006010
Subject(s) - materials science , dielectric , optics , femtosecond , dispersion (optics) , surface plasmon resonance , surface plasmon , nanoparticle , laser , wavelength , plasmon , reflection (computer programming) , surface plasmon polariton , optoelectronics , nanotechnology , physics , computer science , programming language
We have investigated wavelength dispersion of photo-induced nonlinear dielectric function of Au nanoparticle materials. Transient transmission and reflection spectra were sequentially measured by the pump-probe method with a femtosecond laser system. The dispersion of real and imaginary parts of the nonlinear dielectric function of Au:SiO(2) nanoparticle material in the vicinity of the surface plasmon resonance was evaluated from these transient spectra with total differential. A local electromagnetic field factor and interband transition in Au nanoparticles directly dominate the dispersion.