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Proceedings Paper

High-resolution QWIP FPAs for the 8- to 12-µm and 3- to 5-µm regimes
Author(s): Harald Schneider; Joachim Fleissner; Robert Rehm; Martin Walther; Wilfried Pletschen; Peter Koidl; Guenter Weimann; Johann Ziegler; Rainer Breiter; Wolfgang A. Cabanski
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Paper Abstract

We report on our QWIP focal plane array (FPA) developments for the 8 - 12 μm and 3 - 5 μm regimes. In the long-wavelength infrared, we have realized several types of QWIP FPAs with array sizes from 256 × 256 to 640 × 512 pixels and with different active regions, giving rise to photoconductive and photovoltaic operation, respectively. Best thermal resolution in the 8 - 12 μm regime is obtained with low-noise QWIP FPAs which are based on a photovoltaic QWIP structure. Special emphasis is given to our work on a 640 × 512 mid-wave QWIP FPA, which is based on strained InGaAs/AlGaAs quantum wells lattice matched to a GaAs substrate. By optimizing the carrier concentration and the geometry of the two-dimensional grating with 1.65 μm period, a high quantum efficiency of more than 10% in the long-wavelength part of the 3 - 5 µm regime is achieved, resulting in an excellent thermal resolution of only 14.3 mK.

Paper Details

Date Published: 23 January 2003
PDF: 9 pages
Proc. SPIE 4820, Infrared Technology and Applications XXVIII, (23 January 2003); doi: 10.1117/12.451319
Show Author Affiliations
Harald Schneider, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
Joachim Fleissner, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
Robert Rehm, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
Martin Walther, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
Wilfried Pletschen, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
Peter Koidl, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
Guenter Weimann, Fraunhofer-Institut fuer Angewandte Festkoerperphysik (Germany)
Johann Ziegler, AEG Infrarot-Module GmbH (Germany)
Rainer Breiter, AEG Infrarot-Module GmbH (Germany)
Wolfgang A. Cabanski, AEG Infrarot-Module GmbH (Germany)


Published in SPIE Proceedings Vol. 4820:
Infrared Technology and Applications XXVIII
Bjorn F. Andresen; Gabor F. Fulop; Marija Strojnik, Editor(s)

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