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Terahertz range quantum well infrared photodetector
Auteur(s)
Graf, Marcel
Scalari, Giacomo
Faist, Jérôme
Beere, Harvey
Linfield, Edmund
Ritchie, David
Davies, Giles
Date de parution
2004
In
Applied Physics Letters, American Institute of Physics (AIP), 2004/84//475-477
Résumé
We demonstrated a GaAs/AlGaAs-based far-infrared quantum well infrared photodetector at a wavelength of λ=84 <i>µ</i>m. 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</sup> cm √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.
Identifiants
Type de publication
journal article
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