Dresden 2009 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 1: Tutorial (Walter Pfeiffer, Christoph Lienau, Michael Bauer)

O 1.3: Tutorium

Sonntag, 22. März 2009, 17:50–18:30, HSZ 04

Near-field Dynamics Probed with Time-Resolved PEEM — •Michael Bauer — IEAP, Christian-Albrechts-Universität zu Kiel, Kiel, Germany

Photoemission Electron Microscopy (PEEM) in combination with nonlinear photoemission has recently attracted considerable attention due to its high sensitivity to light-induced collective (plasmonic) electron excitations in nanoscale objects at a lateral resolution in the 10 nm regime. A highly promising aspect in this context is the potential of two-photon PEEM to be performed in a time-resolved stroboscopic mode enabling real-time experiments at a temporal resolution in the femtosecond-regime. This allows one to monitor for instance the spatio-temporal dynamics of the local near-field associated with the plasmon mode.

This paper gives an overview of some recent results to exemplify the potential of the PEEM technique in this field. The focus is set on the investigation of periodic and random assemblies of silver nanoparticles in interaction with femtosecond light fields. Aspects, such as the imaging of local near fields [1] and the local field enhancement [2], plasmon dynamics [3], and the manipulation of local near-fields using coherent control schemes [4] will be addressed.

[1] L.I. Chelaru et al., Phys. Rev. B 73, 115416 (2006), L. Douillard al., Nanoletters 8, (2008) 935 [2] M. Chinchetti et al., Phys. Rev. Lett. 95 (2005) 257403 [3] A. Kubo et al., Nanoletters 5 (2005) 1123 [4] M. Aeschlimann et al., Nature 446 (2007) 301