Femtosecond correlated optical reactivity and scanning tunneling microscopy studies of metal surfaces

Mark J. Feldstein; Norbert F. Scherer

doi:10.1117/12.307147

30 April 1998 Femtosecond correlated optical reactivity and scanning tunneling microscopy studies of metal surfaces

Mark J. Feldstein, Norbert F. Scherer

Proceedings Volume 3272, Laser Techniques for Surface Science III; (1998) https://doi.org/10.1117/12.307147
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

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.

Citation Download Citation

Mark J. Feldstein and Norbert F. Scherer "Femtosecond correlated optical reactivity and scanning tunneling microscopy studies of metal surfaces", Proc. SPIE 3272, Laser Techniques for Surface Science III, (30 April 1998); https://doi.org/10.1117/12.307147

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