18 August 2005 Tamm-like interface states in periodical ZnSe/BeTe heterostructures: observed by spectroscopic ellipsometry
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Abstract
Spectral response of lateral optical anisotropy of periodic undoped type-II ZnSe/BeTe heterostructures with nonequivalent interfaces has been studied by spectroscopic ellipsometry. The spectra revealed two types of features corresponding to optical transitions with energies lying in the bandgap. The position of features of the first type does not depend on the heterostructure period. Features of the second type shift toward lower energies with decreasing period of the heterostructure. This behavior is explained in terms of a model taking into account the existence of electronic and hole interface states, as well as of a mixed-type interface state.
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A. S. Gurevich, V. P. Kochereshko, A. V. Platonov, B. A. Zyakin, A. Waag, "Tamm-like interface states in periodical ZnSe/BeTe heterostructures: observed by spectroscopic ellipsometry", Proc. SPIE 5888, Polarization Science and Remote Sensing II, 58881G (18 August 2005); doi: 10.1117/12.615862; https://doi.org/10.1117/12.615862
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