Abstract
A method is proposed for determining the temperature of hot electrons in a metallic nanoparticle embedded in a dielectric matrix under ultrashort laser pulses irradiation. The amplitude and power of the longitudinal spherical acoustic oscillations as functions of density and elastic properties of the medium, the laser pulse duration, the electron temperature, radii of particles, and the electron-phonon coupling constant are obtained. The efficiency of the electron energy transfer from heated noble nanoparticles to a surrounding environment is estimated for different electron temperatures.
Highlights
Metallic nanoparticles (MNs) are mainly studied due to their unique optical properties [1] and extensive practical applications [2,3,4,5]
We proposed a method for determining the temperature of hot electron gas in a metallic nanoparticle embedded in a dielectric matrix under ultrashort laser pulses irradiation
The amplitude and power of the longitudinal sound wave generated by the excess pressure of an electron gas inside the MN driven by ultrashort laser pulses are calculated
Summary
Metallic nanoparticles (MNs) are mainly studied due to their unique optical properties [1] and extensive practical applications [2,3,4,5]. The acoustic oscillations of MNs excited by ultrashort laser pulses have been under intense study [1,2,3,4,5,6,7,8,9] This is due to the availability of important data relating to the elastic properties of these particles and their mechanical coupling to the surrounding medium, which forms the foundation for the design of elasticity sensors in the nanometer range [10]. The amplitude and power of the longitudinal sound wave generated by the excess pressure of an electron gas inside the MN driven by ultrashort laser pulses are calculated. This problem has been little studied theoretically
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