Dynamical Screening at a Metal Surface Probed by Second-Harmonic Generation
- 19 September 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 61 (12), 1380-1383
- https://doi.org/10.1103/physrevlett.61.1380
Abstract
The surface sensitivity of second-harmonic generation has been utilized to measure the spatial and frequency dependence of the local field generated at the surface of a nearly free-electron metal by an external electromagnetic field. The second-harmonic signal as a function of film thickness for a thin layer of alkali metal deposited onto a single-crystal substrate produces a direct image of the damped oscillatory longitudinal field generated in the metal in response to the external field.Keywords
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