Abstract
We report here results of a study of the clean Si(111) surface by means of optical second-harmonic generation (SHG). The surface-specific SHG technique has previously been applied to probe a variety of properties of adsorbates and adsorbate-covered surfaces,1 In this work, we have extended the method to treat the problem of clean well-defined crystalline surfaces. We find that the SH response is dominated by the surface contribution and shows markedly different dependences on the polarization of the fundamental and harmonic beams for the distinct surface structures of the 2 × 1 and 7×7 reconstructions.
© 1985 Optical Society of America
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