Open AccessFemtosecond absorption dynamics in glass-metal nanocomposites
Author(s) -
Mikko Halonen,
A. A. Lipovskii,
Yu. P. Svirko
Publication year - 2007
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.006840
Subject(s) - femtosecond , materials science , picosecond , copper , attenuation coefficient , absorption (acoustics) , optics , saturable absorption , doping , nonlinear optics , nanocomposite , relaxation (psychology) , optoelectronics , laser , fiber laser , nanotechnology , composite material , wavelength , psychology , social psychology , physics , metallurgy
We report strong optical nonlinearity of glasses embedded with copper and silver nanoparticles. In pump-probe experiments with copper-doped glasses, the observed absorption bleaching with picosecond relaxation time is as high as 22%. Transmission femtosecond measurementsreveal the reverse saturable absorption with nonlinear absorption coefficient of 10(-10)cm/W in both copper- and silver-doped nanocomposites.