Photocurrent measurements in a Quantum Cascade Detector under strong magnetic field

Nicolas Péré-Laperne (1) , Louis-Anne de Vaulchier (1) , Aurore Gomez (2, 3) , Alexandro Nedelcu (3) , Xavier Marcadet (3) , Yves Guldner (1) , Vincent Berger (2)

1 LPA - Laboratoire Pierre Aigrain
2 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
3 Thales Research and Technology [Palaiseau]

In the present work, we performed photocurrent measurement on a quantum cascade detector structure under strong magnetic field applied parallel to the growth axis. The photocurrent shows strong oscillations as a function of B. We develop a model in order to describe current as a function of magnetic field. The excellent agreement with the experimental data supports the idea that an elastic scattering process plays a central role in the behavior of those structures. Thanks to zero magnetic field consideration, we establish that dominant process is impurities scattering process. These experiments lead to the key parameters to understand and optimize those structure further.

Domains: Materials Science [cond-mat.mtrl-sci]

Nicolas Péré-Laperne, Louis-Anne de Vaulchier, Aurore Gomez, Alexandro Nedelcu, Xavier Marcadet, et al.. Photocurrent measurements in a Quantum Cascade Detector under strong magnetic field. 29th International Conference on the Physics of Semiconductors, 2008, Rio de Janeiro, Brazil. pp.227. ⟨hal-00518093⟩