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Proceedings Paper

Infrared Intersubband Absorption At 8.2 m In Doped Superlattices Of GaAs/AlAs
Author(s): B. F. Levine; R. J. Malik; J. Walker; K. K. Choi; C. G. Bethea
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Paper Abstract

Intersubband absorption has been measured in a 50 period superlattice composed 71 Å GaAs wells separated by 30 Å barriers of AlAs. The peak absorption was observed at 1224 cm-1 corresponding to 8.2 μm. The absorbed oscillation strength was extremely large in agree-ment with theory. Using a different superlattice having AlxGal-xAs barriers, we fabricated a detector sensitive to 10 μm infrared radiation. It had a responsivity of R= 0.52 A/W, and a narrow band spectral response of Δλ/λ = 10%.

Paper Details

Date Published: 11 August 1987
PDF: 5 pages
Proc. SPIE 0792, Quantum Well and Superlattice Physics, (11 August 1987); doi: 10.1117/12.940835
Show Author Affiliations
B. F. Levine, AT&T Bell Laboratories (United States)
R. J. Malik, AT&T Bell Laboratories (United States)
J. Walker, AT&T Bell Laboratories (United States)
K. K. Choi, AT&T Bell Laboratories (United States)
C. G. Bethea, AT&T Bell Laboratories (United States)


Published in SPIE Proceedings Vol. 0792:
Quantum Well and Superlattice Physics
Gottfried H. Doehler; Joel N. Schulman, Editor(s)

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