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Article Dans Une Revue Applied Physics Letters Année : 2010

Interface roughness transport in terahertz quantum cascade detectors

Résumé

Infrared detectors based on a quantum cascade have been proposed to suppress the dark current which is a limiting factor in quantum well infrared photodetectors. Those detectors have been mainly designed for the midinfrared wavelength. Operating in the terahertz range involves a complete change of regime of transport since the photon energy is lower than the optical phonon energy. Thanks to a two dimensional model of transport, we have identified interface roughness as the key interaction in such a structure. Interface parameters, evaluated by scanning transmission electron microscopy, are used to study their influence on the resistance of the device.
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Dates et versions

hal-01438633 , version 1 (25-08-2020)

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Emmanuel Lhuillier, Isabelle Ribet-Mohamed, Emmanuel Rosencher, Gilles Patriarche, Amandine Buffaz, et al.. Interface roughness transport in terahertz quantum cascade detectors. Applied Physics Letters, 2010, 96, pp.061111. ⟨10.1063/1.3310022⟩. ⟨hal-01438633⟩
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