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Proceedings Paper

Femtosecond correlated optical reactivity and scanning tunneling microscopy studies of metal surfaces
Author(s): Mark J. Feldstein; Norbert F. Scherer
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Paper Abstract

A new experimental technique, correlated optical reactivity and scanning tunneling microscopy (CORSTM), is shown to be a uniquely powerful tool for the study of spatially localized reactivity of surfaces. In particular, CORSTM measurements directly correlate electromagnetic field enhancements that affect chemical dynamics and reactivity with surface topography on the length scale of a few nanometers. These measurements are based on the detection of surface plasmon polariton mediated multi-photon ionization from metal surfaces using ultrafast optical excitation and scanning probe microscopy photoelectron detection. The CORSTM approach is extended to a pump-probe scheme facilitating spatially localized measurement of hot electron dynamics. The experimental results provide direct confirmation of the optimal structural topographies for surface enhanced spectroscopy predicted by electromagnetic theories. CORSTM will provide a better understanding of phenomena that involve plasmons through the direct measurement of structure-function correlations.

Paper Details

Date Published: 30 April 1998
PDF: 8 pages
Proc. SPIE 3272, Laser Techniques for Surface Science III, (30 April 1998); doi: 10.1117/12.307147
Show Author Affiliations
Mark J. Feldstein, Naval Research Lab. (United States)
Norbert F. Scherer, Univ. of Chicago (United States)

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

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