Surface Plasmon Dynamics in Silver Nanoparticles Studied by Femtosecond Time-Resolved Photoemission

作者：J. Lehmann, M. Merschdorf, Wolfgang Helmut Pfeiffer, Andreas Thon, Sabine Voll, G. Gerber · 发表于：Physical Review Letters · 年份：2000 · DOI：10.1103/physrevlett.85.2921 · 被引用次数：216 · 研究领域：Gold and Silver Nanoparticles Synthesis and Applications、nanoparticles nucleation surface interactions、Electron and X-Ray Spectroscopy Techniques

Multiphoton photoelectron spectroscopy reveals the multiple excitation of the surface plasmon in silver nanoparticles on graphite. Resonant excitation of the surface plasmon with 400 nm femtosecond radiation allows one to distinguish between photoemission from the nanoparticles and the substrate. Two different previously unobserved decay channels of the collective excitation have been identified, namely, decay into one or several single-particle excitations.