Two time scales of the electron-hole spin relaxation in InAs/GaAS quantum dots

C. Testelin (1) , Emmanuel Aubry (2) , M. Chaouache , M. Maaref (3) , Frédéric Bernardot (1) , M. Chamarro (1) , J. M. Gerard

1 INSP - Institut des Nanosciences de Paris
2 INSP - Institut des Nanosciences de Paris
3 Unité de Recherche en Physique des Semiconducteurs et Capteurs

We have performed time-resolved differential transmission on an ensemble of InAs/GaAs self-assembled quantum dots. We have calculated the polarization rate decay, on which two time scales in the electron-hole spin relaxation dynamics are observed. A study versus the energy of the interband transition reveals that the fast spin relaxation becomes important when excited and mixed states are involved. (C) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Domaines: Matière Condensée [cond-mat]

C. Testelin, Emmanuel Aubry, M. Chaouache, M. Maaref, Frédéric Bernardot, et al.. Two time scales of the electron-hole spin relaxation in InAs/GaAS quantum dots. physica status solidi (b), 2006, 243 (15), pp.3928-3931. ⟨10.1002/pssb.200671603⟩. ⟨hal-01284393⟩