Quantum efficiency of a 2-level InAs/AlSb quantum cascade structure

C. Faugeras (1) , A. Leuliet (2) , A. Vasanelli , C. Sirtori (2, 3) , A. Wade (4, 5) , G. Fedorov (4, 6) , D. Smirnov (4, 6) , R. Teissier (7, 8) , A. N. Baranov (7, 8) , D. Barat (7) , J. Devenson (7)

1 LCMI-GHMFL - Laboratoire des champs magnétiques intenses
2 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
3 Thales Research and Technology [Palaiseau]
4 NHMFL - National High Magnetic Field Laboratory
5 Aquatic Environments Research Centre
6 LNCMP - Laboratoire National des Champs Magnétiques Pulsés
7 IES - Institut d’Electronique et des Systèmes
8 NANOMIR - Composants à Nanostructure pour le moyen infrarouge

The quantum efficiency of an electroluminescent intersubband emitter based on InAs/AlSb has been measured as a function of the magnetic field up to 20T. Two series of oscillations periodic in 1/B are observed, corresponding to the elastic and inelastic scattering of electrons of the upper state of the radiative transitions. Experimental results are accurately reproduced by a calculation of the excited state lifetime as a function of the applied magnetic field. The interpretation of these data gives an exact measure of the relative weight of the scattering mechanisms and allows the extraction of material parameters such as the energy dependent electron effective mass and the optical phonon energy

Mots clés: Quantum cascade; magneto-phonon resonance; InAs/AlSb

Domaines: Electronique

C. Faugeras, A. Leuliet, A. Vasanelli, C. Sirtori, A. Wade, et al.. Quantum efficiency of a 2-level InAs/AlSb quantum cascade structure. International Journal of Modern Physics B, 2007, 21 (8-9), pp.1471-1475. ⟨10.1142/S0217979207043038⟩. ⟨hal-00327658⟩