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16.5 <i>µ</i>m quantum cascade detector using miniband transport
Auteur(s)
Giorgetta, Fabrizio R.
Baumann, Esther
Graf, Marcel
Ajili, Lassaad
Hoyler, Nicolas
Faist, Jérôme
Krötz, Peter
Sonnabend, Guido
Date Issued
2007
Journal
Applied Physics Letters, American Institute of Physics (AIP), 2007/90/231111/1-3
Abstract
The authors report on an InP based photovoltaic quantum cascade detector operating at 16.5 <i>µ</i>m and using miniband-based vertical transport. This concept allowed the construction of a longitudinal optical phonon extraction stair with two rungs without touching on a high device resistance. At 10 K, they observed a responsivity of 1.72 mA/W and a Johnson noise limited detectivity of 2.2×109 Jones. Altogether, this design resulted in detection at temperatures of up to 90 K with a lower bandwidth limit of 200 MHz imposed by the measurement setup.
Publication type
journal article
