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Proceedings Paper

Observation of Wannier-Stark localization in shallow superlattices
Author(s): Keith W. Goossen; John E. Cunningham; William Jan
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Paper Abstract

Surprisingly, the onset of superlattice (SL)-type electroabsorption (EA) (localization/delocalization and Stark ladder phenomena) as multi-quantum well (MQW) barriers are lowered does not correlate with miniband width. As the barriers of a 100/100 angstroms GaAs/AlxGa-1As MQW are lowered to x equals 0.01, similar (quantum confined Stark effect) EA as for x equals 0.3 samples is seen. For x equals 0.02, as the MQW period (d) is shortened to 140 angstroms, SL-type EA is observed but does not correlate with miniband width. This shows that standard models do not apply for shallow systems. For x equals 0.07 and d equals 175 angstroms SL effects consistent with standard models are observed.

Paper Details

Date Published: 3 September 1992
PDF: 9 pages
Proc. SPIE 1675, Quantum Well and Superlattice Physics IV, (3 September 1992); doi: 10.1117/12.137621
Show Author Affiliations
Keith W. Goossen, AT&T Bell Labs. (United States)
John E. Cunningham, AT&T Bell Labs. (United States)
William Jan, AT&T Bell Labs. (United States)


Published in SPIE Proceedings Vol. 1675:
Quantum Well and Superlattice Physics IV
Gottfried H. Doehler; Emil S. Koteles, Editor(s)

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