TITLE

Terahertz range quantum well infrared photodetector

AUTHOR(S)
Graf, Marcel; Scalari, Giacomo; Hofstetter, Daniel; Faist, Jérôme; Beere, Harvey; Linfield, Edmund; Ritchie, David; Davies, Giles
PUB. DATE
January 2004
SOURCE
Applied Physics Letters;1/26/2004, Vol. 84 Issue 4, p475
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We demonstrated a GaAs/AlGaAs-based far-infrared quantum well infrared photodetector at a wavelength of λ=84 μm. The relevant intersubband transition is slightly diagonal with a dipole matrix element of 3.0 nm. At 10 K, a responsivity of 8.6 mA/W and a detectivity of 5×10[sup 7] cm [Square_Root]Hz/W have been achieved; and successful detection up to a device temperature of 50 K has been observed. Being designed for zero bias operation, this device profits from a relatively low dark current and a good noise behavior. © 2004 American Institute of Physics.
ACCESSION #
12020910

 

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