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Titolo:
Ten years of QWIP development at Fraunhofer IAF
Autore:
Schneider, H; Koidl, P; Walther, M; Fleissner, J; Rehm, R; Diwo, E; Schwarz, K; Weimann, G;
Indirizzi:
Fraunhofer Inst Angew Festkorperphys, D-79108 Freiburg, Germany FraunhoferInst Angew Festkorperphys Freiburg Germany D-79108 g, Germany
Titolo Testata:
INFRARED PHYSICS & TECHNOLOGY
fascicolo: 3-5, volume: 42, anno: 2001,
pagine: 283 - 289
SICI:
1350-4495(200106/10)42:3-5<283:TYOQDA>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
WELL INFRARED PHOTODETECTORS; QUANTUM-WELL; MU-M; DETECTORS; VOLTAGE; NOISE; PERFORMANCE; TRANSITIONS; GAIN;
Keywords:
quantum well infrared photodetector; GaAs/AlGaAs; focal plane array; thermal imaging; noise-equivalent; temperature difference;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Schneider, H Fraunhofer Inst Angew Festkorperphys, Tullastr 72, D-79108 Freiburg, Germany Fraunhofer Inst Angew Festkorperphys Tullastr 72 Freiburg Germany D-79108
Citazione:
H. Schneider et al., "Ten years of QWIP development at Fraunhofer IAF", INFR PHYS T, 42(3-5), 2001, pp. 283-289

Abstract

We report on our quantum well infrared photodetector (QWIP) developments aimed at high-performance thermal imaging with two-dimensional focal plane arrays (FPA). Due to the limited charge storage capacity of todays readout circuits, high internal quantum efficiencies in combination with moderate responsivities and noise currents an desirable in order to optimize thermal resolution. Using FPAs comprising photoconductive QWIPs, very good noise-equivalent temperature differences better than 10 mK are obtained at small applied electric fields of 3-5 kV/cm. We also summarize the detection properties of photovoltaic "low-noise" QWIPs. In this novel device, the photoexcited-carrier mean free path corresponds to only one period of the active region and the noise associated with carrier capture is suppressed. Further improvement of the temperature resolution, in combination with an extremely large dynamic range, has been achieved using FPA cameras based on this detector concept. At present, QWIP FPAs achieve the best temperature resolution ofany detector technology operating in the long-wavelength infrared atmospheric window. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 17:45:39