Nonlinear optical characterization of silver nanoparticles embedded in phosphate glass

Abstract

The nonequilibrium carrier dynamics in spherical silver nanoparticles embedded in aluminophosphate glass system was explored by femtosecond optical pump-probe technique. Photoluminescence and absorption spectroscopy were used for characterization of linear optical properties and particle size estimation. The two temperature model is employed to study the hot electron subsystem and evolution of electronic and lattice temperatures. The electron scattering dynamics on the 10 -13 -10 -12 sec scale and two-photon absorption process are discussed. The laser-induced coherent vibrations of silver nanoparticles were observed in transient transmission experiments for relatively large particles with radii ~35 nm.

ZnO Nanoparticles Concentration Dependent Optical Properties of Erbium Doped Phosphate Glass

“…These glasses are promising for biomedical, photonic and laser applications due to their large nonlinear optical performance and quantum efficiency. This enhancement in optical response of the rare earth ion due to the interaction of surface plasmon resonance excitations of metallic NPs and subsequent increase in the intensity is now primarily attributed to the energy transfer from small metal aggregates to rare earth ion [2]. The collective oscillations of conduction electrons called surface plasmon exhibited by metallic NPs at certain defined frequencies in the visible and near-infrared region of the optical spectrum can be exploited for device miniaturization and functionality.…”