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Proceedings Paper

Optoelectronic properties of photodiodes for the mid-and far-infrared based on the InAs/GaSb/AlSb materials family
Author(s): Frank Fuchs; L. Buerkle; R. Hamid; N. Herres; Wilfried Pletschen; R. E. Sah; Rudolf Kiefer; J. Schmitz
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Paper Abstract

The optoelectronic properties of short-period InAs/(GaIn)Sb superlattices (SLs) grown by molecular beam epitaxy on GaSb substrates are discussed. We report on the optimization of the SL materials properties with special emphasis on the use for infrared detection devices. The materials quality is evaluated by using high resolution x-ray diffraction, atomic force microscopy, and photoluminescence spectroscopy. In- plane magneto-transport investigations were performed applying mobility spectrum analysis. The SL diodes were analyzed performing standard electro-optical measurements. The observation of resonances in the I-V curves in the regime of Zener-tunneling due to Wannier-Stark localization opens a new tool for the electrical investigation of photodiodes with low band gap energy. The status of the processing technology is reported demonstrating the feasibility for the fabrication of 256 X 256 focal plane arrays operating in the 8-to-12 micrometers atmospheric window. In addition, results are given for mid-infrared SL-diodes, grown with lattice matched AlGaAsSb barriers instead in the binary InAs/GaSb SL system.

Paper Details

Date Published: 12 June 2001
PDF: 12 pages
Proc. SPIE 4288, Photodetectors: Materials and Devices VI, (12 June 2001); doi: 10.1117/12.429404
Show Author Affiliations
Frank Fuchs, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
L. Buerkle, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
R. Hamid, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
N. Herres, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
Wilfried Pletschen, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
R. E. Sah, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
Rudolf Kiefer, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
J. Schmitz, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)


Published in SPIE Proceedings Vol. 4288:
Photodetectors: Materials and Devices VI
Gail J. Brown; Manijeh Razeghi, Editor(s)

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