Abstract
Recently, second harmonic generation (SHG) has been used as a probe of adsorbate-induced changes in the electronic properties of surfaces.1 SHG has also been shown to reveal structural symmetry of semiconductor surfaces2 and has been used as a measure of surface-order during melting.3 This latter sensitivity to structural order arises from a remarkable anisotropy in the SH signal from a crystalline surface as the surface is rotated about its surface normal.
© 1986 Optical Society of America
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