Abstract
The sensitivity of second harmonic generation at interfaces has been utilized to probe the spatial and frequency dependence of the local field generated near the surface of a nearly free electron metal by an externally imposed electromagnetic field. The longitudinal screening field was found to oscillate with a wavelength on the order of 10A and to propagate into the bulk several layers deep.
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Song, K.J., Heskett, D., Urbach, L. et al. Second Harmonic Generation from Alkali Thin Films on Ag(110). MRS Online Proceedings Library 83, 259–264 (1986). https://doi.org/10.1557/PROC-83-259
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DOI: https://doi.org/10.1557/PROC-83-259