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The electronic structure of the perturbed superlattice: the case of Bragg-confined double quantum well resonant structures

✍ Scribed by D. Indjin; V. Milanović; Z. Ikonić

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
341 KB
Volume
23
Category
Article
ISSN
0749-6036

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✦ Synopsis

The electronic structure of a perturbed superlattice of the Bragg-confined resonant structure type is discussed within the effective mass approximation. Expressions for bound-state energies and wavefunctions in these structures are derived in general form, valid for any symmetric form of the potential and effective mass modulation. The special case of rectangular superlattices with a perturbation layer is considered in more detail. The influence of the structure parameters on properties of Bragg-confined states is analysed, and positions of bound states lying in minigaps of the structure with the resonant double-well pertubation layer are determined. The possibilities of finding optimal structure parameters in respect to the maximal localization of the bound-state wavefunctions, in a broad range of above-the-barrier energies, are also discussed.

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