Excitons in semiconducting superlattices, quantum wells, and ternary alloys
- Dartmouth Coll., Hanover, NH (USA). Dept. of Physics
- Bellcore, Red Bank, NJ (USA)
It is now possible to fabricated semiconducting layered structures with precisely defined layer thicknesses of a few atomic diameters. Examples are the quantum well'' and the superlattice'' structures, in which semiconductors with different band gaps are interleaved. Microstructures'' can be produced from this material by patterning and etching them on a small ({approximately}10nm) scale. Their electronic properties are quite different from those of the constituents and offer interesting new possibilities both in device design and in basic physics. This proposal aims to improve our understanding of optically excited states ( excitons'' and electron-hole plasmas'') in these structures. Work will also continue on ternary alloys, primarily to establish if the alloy disorder produces a mobility edge for excitons, and on II-VI compounds, where the principal interest at present is in the nature of the exciton-phonon coupling.
- Research Organization:
- Dartmouth Coll., Hanover, NH (USA). Dept. of Physics
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- FG02-87ER45330
- OSTI ID:
- 6882850
- Report Number(s):
- DOE/ER/45330-2; ON: DE90017287
- Country of Publication:
- United States
- Language:
- English
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Excitons in semiconducting superlattices, quantum wells, and ternary alloys
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Related Subjects
360602* -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
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