Observation of Transitions between Electronic States at the (111)AFace of CdTe by Electrolyte Electroreflectance

Abstract

The observation of a large piezoelectric contribution to the electroreflectance signal from the (111) $A$ face of CdTe is reported. This contribution, which is absent from the $B$-face signal, is associated with two-dimensional interfacial strains between the $A$ face and a thin native oxide film. Line-shape analysis is used to verify the nature of this contribution and to obtain values for the transition energy and other quantities which characterize the electronic band structure at the interface.