Investigation on transient relaxation in Ag-BaO composite thin film with pump supercontinuum-probe technique

Optical transient absorption spectra of Ag-BaO thin film were detected ill the wavelength range from 450 to 800 nm by the pump supercontinuum-probe technique with 130 fs time resolution. The optical ultrafast relaxation, in which the electrons near the Fermi level of silver nanoparticles were excited to non-equilibrium state and then returned to equilibrium state, was observed. The decay times were exponentially fitted and varied from 4 to 0.67 ps depending on the probe wavelength. The peak unoccupied state, X-4', of electrons in silver was estimated to locate at 1.47 eV above the Fermi level.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000176818900008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Physics, AppliedSCI(E)EI4ARTICLE121326-13293