Electron Dynamics in Copper Metallic Nanoparticles Probed with Femtosecond Optical Pulses

J. -Y. Bigot; J. -Y. Merle; O. Cregut; A. Daunois

doi:10.1103/PhysRevLett.75.4702

Electron Dynamics in Copper Metallic Nanoparticles Probed with Femtosecond Optical Pulses

J. -Y. Bigot, J. -Y. Merle, O. Cregut, and A. Daunois

Phys. Rev. Lett. 75, 4702 – Published 18 December 1995

Abstract

The thermalization of electrons in copper nanoparticles embedded in glass is investigated using femtosecond pump-probe spectroscopy. The time dependent induced transmission is enhanced near the surface plasmon resonance of the nanoparticles, as opposed to the static one obtained with thermomodulation measurements. In addition, a slowing of the process of electron cooling to the lattice temperature is observed at the plasmon resonance. These observations show the importance of quasiparticle collisions in confined metallic structures.

Received 9 May 1995

DOI:https://doi.org/10.1103/PhysRevLett.75.4702

Authors & Affiliations

J. -Y. Bigot, J. -Y. Merle, O. Cregut, and A. Daunois

Insitut de Physique et Chimie des Matériaux de Strasbourg, Groupe d'Optique Nonlinéaire et d'Optoélectronique, Unité mixte 380046 CNRS-ULP-EHICS, 23 rue du Loess, 67037 Strasbourg Cedex, France