Determining metal-semiconductor interface structure by optical second-harmonic generation
- 1 February 1987
- journal article
- Published by IOP Publishing in Semiconductor Science and Technology
- Vol. 2 (2), 102-107
- https://doi.org/10.1088/0268-1242/2/2/006
Abstract
Conventional surface science techniques provide little information about the structure of the buried metal-semiconductor interface, where many layers of metal have been deposited on the semiconductor surface. The author shows that optical second-harmonic generation can be used successfully to probe this structure for metal-silicon systems. Second-harmonic studies of Si(111)-Au and Si(100)-Au have been carried out in a conventional ultra-high vacuum system equipped with low-energy electron diffraction and Auger electron spectroscopy. A strong second-harmonic signal is obtained which is shown to originate at the buried interface and to persist through at least 30 AA of deposited gold.Keywords
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