Room temperature absorption in laterally biased Quantum Infrared Detectors fabricated by MBE regrowth
Data(s) |
01/05/2011
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Resumo |
In this paper, we show room temperature operation of a quantum well infrared photodetector (QWIP) using lateral conduction through ohmic contacts deposited at both sides of two n-doped quantum wells. To reduce the dark current due to direct conduction in the wells, we apply an electric field between the quantum wells and two pinch-off Schottky gates, in a fashion similar to a field effect device. Since the normal incidence absorption is strongly reduced in intersubband transitions in quantum wells, we first analyze the response of a detector based on quantum dots (QD). This QD device shows photocurrent signal up to 150 K when it is processed in conventional vertical detector. However, it is possible to observe room temperature signal when it is processed in a lateral structure. Finally, the room temperature photoresponse of the QWIP is demonstrated, and compared with theory. An excellent agreement between the estimated and measured characteristics of the device is found |
Formato |
application/pdf |
Identificador | |
Idioma(s) |
eng |
Publicador |
E.T.S.I. Telecomunicación (UPM) |
Relação |
http://oa.upm.es/12058/2/INVE_MEM_2011_105603.pdf http://dx.doi.org/10.1016/j.jcrysgro.2010.10.159 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jcrysgro.2010.10.159 |
Direitos |
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/openAccess |
Fonte |
Journal of Crystal Growth, ISSN 0022-0248, 2011-05, Vol. 323, No. 1 |
Palavras-Chave | #Telecomunicaciones |
Tipo |
info:eu-repo/semantics/article Artículo PeerReviewed |