Share Email Print
cover

Proceedings Paper

Comparison of the electro-optical performances of symmetrical and asymmetrical MWIR InAs/GaSb superlattice pin photodiodes
Author(s): Isabelle Ribet-Mohamed; M. Tauvy; Rachid Taalat; Cyril Cervera; Jean-Baptiste Rodriguez; Philippe Christol
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

We report the full electrooptical characterization of two MWIR InAs/GaSb superlattice (SL) pin photodiodes. The first one features a symmetrical period with 8 InAs monolayers (MLs) and 8 GaSb MLs, while the second one relies on an asymmetrical period with 7.5 InAs MLs and 3.5 GaSb MLs. This asymmetrical design was recently proposed by IES to both decrease the dark current (since it decreases the intrinsic carrier concentration) and increase the quantum efficiency (since it increases the wavefunctions overlap). We present dark current, noise, spectral response and quantum efficiency measurements. Our results confirm that the asymmetrical design allows to greatly improve the performance of MWIR SL pin photodiodes, with an improvement of more than one decade in terms of dark current and an improvement of a factor 1.5 in terms of quantum efficiency. The noise measurements under dark conditions show that the symmetrical (asymmetrical) sample remains Schottky noise-limited up to a bias voltage of -600mV (resp -800mV) and that 1/f noise remains very low.

Paper Details

Date Published: 21 January 2012
PDF: 15 pages
Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 826833 (21 January 2012); doi: 10.1117/12.914455
Show Author Affiliations
Isabelle Ribet-Mohamed, ONERA (France)
M. Tauvy, ONERA (France)
Rachid Taalat, Institut d'Electronique du Sud, CNRS, Univ. Montpellier 2 (France)
Cyril Cervera, Institut d'Electronique du Sud, CNRS, Univ. Montpellier 2 (France)
Jean-Baptiste Rodriguez, Institut d'Electronique du Sud, CNRS, Univ. Montpellier 2 (France)
Philippe Christol, Institut d'Electronique du Sud, CNRS, Univ. Montpellier 2 (France)


Published in SPIE Proceedings Vol. 8268:
Quantum Sensing and Nanophotonic Devices IX
Manijeh Razeghi; Eric Tournie; Gail J. Brown, Editor(s)

© SPIE. Terms of Use
Back to Top