Lifetime and dephasing of plasmons in Ag nanoparticles

Mathias Scharte; Ron Porath; Torsten Ohms; Martin Aeschlimann; Bernhard Lamprecht; Harald Ditlbacher; Franz Rembert Aussenegg

doi:10.1117/12.449533

5 December 2001 Lifetime and dephasing of plasmons in Ag nanoparticles

Mathias Scharte, Ron Porath, Torsten Ohms, Martin Aeschlimann, Bernhard Lamprecht, Harald Ditlbacher, Franz Rembert Aussenegg

Author Affiliations +

Proceedings Volume 4456, Controlling and Using Light in Nanometric Domains; (2001) https://doi.org/10.1117/12.449533
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

In this work the dynamics of laser excited electrons in elliptic shaped silver nanoparticles were studied by means of the time-resolved two-photon-photoemission technique. The shape of the nanoparticles allows to distinguish between particle plasmon excitation and electron-hole pair excitation (intraband process) by simply changing the polarization of the laser pulse. These comparative studies, using the same experimental apparatus, enable us to study the respective role of collective and quasi-particle excitation in the electron dynamics of a metallic nanoparticle. The results are analyzed with a three level model according to the Liouville-von Neumann equation. The first measurements indicate that the electron dynamics vary considerably between these two excitation cases.

Citation Download Citation

Mathias Scharte, Ron Porath, Torsten Ohms, Martin Aeschlimann, Bernhard Lamprecht, Harald Ditlbacher, and Franz Rembert Aussenegg "Lifetime and dephasing of plasmons in Ag nanoparticles", Proc. SPIE 4456, Controlling and Using Light in Nanometric Domains, (5 December 2001); https://doi.org/10.1117/12.449533

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