Dresden 2011 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 42: Poster I: Progress in Micro- and Nanopatterning: Techniques and Applications (jointly with O); Spins in Organic Materials; Ion Interactions with Nano Scale Materials; Organic Electronics and Photovoltaics; Plasmonics and Nanophotonics (jointly with HL and O); High-k and Low-k Dielectrics (jointly with DF); Organic Thin Films; Nanoengineered Thin Films; Layer Deposition Processes; Layer Properties: Electrical, Optical, and Mechanical Properties; Thin Film Characterisation: Structure Analysis and Composition; Application of Thin Films
DS 42.117: Poster
Mittwoch, 16. März 2011, 15:00–17:30, P1
Femtosecond pump-probe spectroscopy of the dielectric function of a polymer matrix with embedded gold nanoparticles — •Mareike Kiel1, Steffen Mitzscherling1, and Matias Bargheer1,2 — 1Institut für Physik, Universität Potsdam, Germany — 2Helmholtz Zentrum Berlin, Germany
We investigate a well characterized multilayered compound system [1] of polyelectrolytes and gold nanoparticles with femtosecond pump-probe spectroscopy. The transient absorption A(t) and reflection R(t) after heating the electrons with an intense femtosecond laser pulse are measured simultaneously. We test the well known theoretical model that ascribes the observed signals to the smearing of the Fermi-edge of the conduction electrons by a quantitative comparison to the simultaneously measured A(t) and R(t). In a separate evaluation scheme we directly derive the real and imaginary part of the dielectric function of the composite material from the experiment. A detailed comparison of the two approaches is given.
[1] M. Kiel et al., Langmuir 26, 18499 (2010)