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Optical second harmonic generation studies of the nature of the GaAs(100) surface in air |
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| Authors: | S R Armstrong R D Hoare M E Pemble I M Povey A Stafford A G Taylor |
| Institution: | Department of Chemistry, University of Manchester Institute of Science and Technology, P.O. Box 88, Sackville Street, Manchester M60 1QD, UK |
| Abstract: | We present in this paper a study of the non-linear optical response of the GaAs/air interface as measured by second harmonic generation. By careful choice of incidence and analysis electric vectors for the radiation the second harmonic response as a function of crystallographic orientation has been characterized for a GaAs(100) surface. The exact origin of the response remains unclear but comments on the surface specificity of the technique are made and the observed anisotropy in the data is explained in terms of the step density of the crystal surface. |
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