The optical transient absorption spectra of an Ag-BaO thin film have been detected at a wavelength ranging from 400nm to 1000nm using the pump supercontinuum probe technique with a resolution of 130fs.We have observed the optical ultrafast relaxation,in which the electrons near the Fermi level of Ag nanoparticles were excited to a non-equilibrium state and then returned to an equilibrium state.The decay time was exponentially fitted and varied from 0.67ps to 4ps for different components of the supercontinuum probe.The peak of an unoccupied state for silver at level X'4 was estimated to be 1.47eV above the Fermi level.
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机译：a comparative study of optical and radiative characteristics of X-ray-induced luminescent defects in ag-doped glass and LiF thin films and their applications in 2-D imaging
