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Proceedings Paper

Performances analysis of symmetrical and asymmetrical InAs/GaSb superlattice pin photodiode
Author(s): C. Cervera; R. Taalat; P. Christol; J. B. Rodriguez; K. Jaworowicz; I. Ribet-Mohamed; L. Konczewicz; S. Contreras
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Paper Abstract

Symmetric and asymmetric mid-wavelength infrared (MWIR) InAs/GaSb superlattice (SL) pin photodiode were fabricated by Molecular Beam Epitaxy (MBE) on p-type GaSb substrate and characterized as a function of temperature. The symmetric SL structure was made of 8 InAs monolayers (MLs) and 8 GaSb MLs and exhibits at 80K a cut-off wavelength (λc) of 4.5μm, while the asymmetric SL design was composed of 7.5 InAs MLs and 3.5 GaSb MLs for λc = 5.5μm at 80K. Optical characterizations made of photoluminescence as a function of temperature and room temperature absorption spectra were performed on these two kinds of structures. Several electrical characterizations including dark current and capacitance-voltage measurements were also carried out on single detectors in the temperature range [77K-300K]. Results obtained were compared and analyzed in order to define optimized SL structure design for the high performance in the MWIR domain.

Paper Details

Date Published: 20 May 2011
PDF: 10 pages
Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 801213 (20 May 2011); doi: 10.1117/12.882133
Show Author Affiliations
C. Cervera, Institut d'Electronique du Sud, CNRS,Univ. Montpellier 2 (France)
R. Taalat, Institut d'Electronique du Sud, CNRS,Univ. Montpellier 2 (France)
P. Christol, Institut d'Electronique du Sud, CNRS,Univ. Montpellier 2 (France)
J. B. Rodriguez, Institut d'Electronique du Sud, CNRS,Univ. Montpellier 2 (France)
K. Jaworowicz, ONERA (France)
I. Ribet-Mohamed, ONERA (France)
L. Konczewicz, Lab. Charles Coulomb, CNRS, Univ. Montpellier 2 (France)
S. Contreras, Lab. Charles Coulomb, CNRS, Univ. Montpellier 2 (France)


Published in SPIE Proceedings Vol. 8012:
Infrared Technology and Applications XXXVII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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