https://doi.org/10.1007/s100530050161
Field amplification in Na clusters
1
Institut für Theoretische Physik II,
Universität Erlangen-Nürnberg,
Staudtstr. 7, 91058 Erlangen, Germany
2
Laboratoire de Physique Quantique, Université Paul Sabatier,
118 Route de Narbonne, 31062 Toulouse Cedex, France
3
Institut Universitaire de France
Received:
23
April
1998
Revised:
22
May
1998
Accepted:
22
May
1998
Published online: 15 August 1998
We study the amplification of an incoming fs laser pulse through the resonant plasmon response in a metal cluster taking Na clusters as test case and using density-functional theory for the description of the electronic dynamics. We find large amplification factors for moderate laser intensities. The effect shrinks for higher intensities because the binding forces of the electron cloud set a limit for the effective fields. The response shows resonant behaviour much similar to an harmonic oscillator. It is found to be independent of cluster size.
PACS: 36.40.Cg – Electronic and magnetic properties of clusters / 36.40.Gk – Plasma and collective effects in clusters / 36.40.Wa – Charged clusters
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998
