Enhancement of the second harmonic signal from Hg1−xCdxTe (MCT) in the presence of an anodic oxide film
- Wark, A.W.
- McErlean, K.
- Cruickshank, F.R.
- Berlouis, L.E.A.
- Brevet, P.F.
DOIAbstract
Second harmonic generation (SHG) is now widely regarded as a valuable tool for investigating electrode surfaces. Typically, most studies have been limited to substrates which lack bulk symmetry and monitoring events such as sub-monolayer formation and surface reconstruction. Here, the development of a model that can be used to quantitatively describe the enhanced SH signal observed in the presence of an anodic oxide film on a non-centrosymmetric substrate, Hg1xCdxTe (MCT), is described. The aim is to further expand the utility of SHG for probing different electrode systems. The growth of the high quality oxide films was first followed by in-situ ellipsometry. For thin films (<100 nm) grown at a constant current density of 150 A cm2, an effe...
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