Modification of vibrational damping times in thin gold films by self-assembled molecular layers

The mechanical contact between a thin gold film and a silicon substrate is investigated by ultrafast pump-probe spectroscopy providing quantitative values on the damping time of coherent longitudinal vibrations of the gold film. A distinct increase in damping times is observed when a self-assembled molecular layer is introduced between the gold film and the substrate. We deduce the frequency dependence of the damping times by varying the thickness of the gold films. Experimental results are compared to numerical simulations based on a visco-elastic model and the acoustic mismatch model.

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530 Physik

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ISO 690

HETTICH, Mike, Axel BRUCHHAUSEN, Stephen RIEDEL, Tobias GELDHAUSER, Simon VERLEGER, Daniel ISSENMANN, Oliver RISTOW, Richa CHAUHAN, Jürg DUAL, Artur ERBE, Elke SCHEER, Paul LEIDERER, Thomas DEKORSY, 2011. Modification of vibrational damping times in thin gold films by self-assembled molecular layers. In: Applied Physics Letters. 2011, 98(26), 261908. ISSN 0003-6951. Available under: doi: 10.1063/1.3604790

BibTex

@article{Hettich2011Modif-14024,
  year={2011},
  doi={10.1063/1.3604790},
  title={Modification of vibrational damping times in thin gold films by self-assembled molecular layers},
  number={26},
  volume={98},
  issn={0003-6951},
  journal={Applied Physics Letters},
  author={Hettich, Mike and Bruchhausen, Axel and Riedel, Stephen and Geldhauser, Tobias and Verleger, Simon and Issenmann, Daniel and Ristow, Oliver and Chauhan, Richa and Dual, Jürg and Erbe, Artur and Scheer, Elke and Leiderer, Paul and Dekorsy, Thomas},
  note={Article Number: 261908}
}

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