| DOI | Trouver le DOI : https://doi.org/10.1117/12.870923 |
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| Auteur | Rechercher : Delga, A.; Rechercher : Jasnot, F.R.; Rechercher : Buffaz, A.; Rechercher : Guo, H.1; Rechercher : Doyennette, L.; Rechercher : De Vaulchier, L.A.; Rechercher : Wasilewski, Z.R.1; Rechercher : Liu, H.C.1; Rechercher : Berger, V. |
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| Affiliation | - Conseil national de recherches du Canada. Institut des sciences des microstructures du CNRC
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| Format | Texte, Article |
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| Conférence | Quantum Sensing and Nanophotonic Devices VIII, January 23-27, 2011, San Francisco, CA, USA |
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| Sujet | AlGaAs/GaAs; Electron distributions; Electronic transport; High gain; Inter-subband; NDR; Orders of magnitude; Quantum well; QWIP; Shorter wavelength; Structure reorganizations; THz; Transition energy; Band structure; Detectors; Infrared detectors; Magnetic field effects; Nanophotonics; Optoelectronic devices; Quantum chemistry; Structural design; Impact ionization |
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| Résumé | Electronic transport in AlGaAs/GaAs THz Quantum Wells Intersubband Photodetectors (QWIPs) exhibits two different regimes separated by huge discontinuities (up to five orders of magnitude) in the resistivity. They are interpreted in terms of band structure reorganizations triggered by intersubband impact ionization. We will analyze and model their in uence on the electronic transport. The magnitude of the transport modifications is explained by the small transition energy and the sharpness of the electrons distribution at stake in THz QWIPs. Measurements under magnetic field or temperature show that the broadening of the electron distribution damps the effects of impact ionization. Some experimental features of the electronic transport of shorter wavelength detectors are then reproduced. The use of intersubband impact ionization in THz QWIPs to design high gain and fast novel detectors is discussed. © 2011 SPIE. |
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| Date de publication | 2011 |
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| Maison d’édition | SPIE |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21271141 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 0ed0bf55-934a-4e79-b857-59f67b2be985 |
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| Enregistrement créé | 2014-03-24 |
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| Enregistrement modifié | 2020-04-21 |
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