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Proceedings Paper

Surface-induced changes of the optical response of particles in nanoscaled layered systems: a combined experimental and theoretical study
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Paper Abstract

In this work we study metal surface-induced changes of lifetime and transition frequency of alkali atoms and clusters, deposited onto nanoscaled insulator-metal systems. The systems are made of rough metallic surfaces (characterized by atomic force microscopy), onto which ultrathin organic films as spacer layers (characterized by LEED) are epitaxially grown. We observe an unusually small red shift of the transition frequency of Na atoms of a few hundred Megahertz, which is due to the interaction with the metal surface. This is explained by the nonlocal response of the surface, i.e., the excitation of multipole surface plasmons (MSPs) in the selvedge region of the metal surface, which is influenced by surface roughness. The MSPs should become observable also via linear optical methods such as attenuated total reflection spectroscopy. As a first step in this direction, we present linear extinction spectra of alkali cluster films that are grown on top of organic spectra layers of different length. Due to the interaction with the gold films a red shift of the dipole plasmon resonance is observed, which increases with decreasing chain length.

Paper Details

Date Published: 30 April 1998
PDF: 9 pages
Proc. SPIE 3272, Laser Techniques for Surface Science III, (30 April 1998);
Show Author Affiliations
Frank Balzer, Max-Planck-Institut fuer Stroemungsforschung (United States)
Vladimir G. Bordo, Institute of General Physics (Russia)
Horst-Guenter Rubahn, Max-Planck-Institut fuer Stroemungsforschung (Denmark)

Published in SPIE Proceedings Vol. 3272:
Laser Techniques for Surface Science III
Hai-Lung Dai; Hans-Joachim Freund, Editor(s)

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