Second-harmonic generation from the surface of a simple metal, Al
- 17 July 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 63 (3), 318-321
- https://doi.org/10.1103/physrevlett.63.318
Abstract
Quantitative measurements of the second-harmonic response of Al(111), Al(100), and polycrystalline Al to 1.06-μm radiation under ultrahigh-vacuum conditions are presented. The results verify theoretical predictions that at low frequencies the second-harmonic response is sensitive to the charge-density profile of the surface region. The effects of band structure are clearly visible in the anisotropic second-harmonic response for appreciable field components parallel to the surface. The anisotropic response can be interpreted to give information about electronic surface states.Keywords
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