Estimation of electron temperature in heated metallic nanoparticle

TL;DR

This paper introduces a method to estimate the electron temperature in heated metallic nanoparticles using acoustic oscillation measurements, considering various physical parameters and energy transfer efficiency.

Contribution

It presents a novel approach to determine electron temperature in nanoparticles by analyzing acoustic oscillations influenced by ultrashort laser pulses.

Findings

Amplitude and power of acoustic oscillations depend on material and laser parameters.

Electron energy transfer efficiency varies with electron temperature.

The method enables estimation of electron temperature from acoustic data.

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.