Le Journal de Physique IV 03 (1993) C5-351-C5-354
Spin relaxation of excitons in strained InGaAs/GaAs quantum wellsB. DAREYS1, T. AMAND1, X. MARIE1, B. BAYLAC1, J. BARRAU,1, M. BROUSSEAU1, I. RAZDOBREEV1 and D.J. DUNSTAN2
1 Laboratoire de Physique des Solides, URA 74 du CNRS, INSA, Département de Physique, avenue de Rangueil, 31077 Toulouse cedex, France
2 Department of Physics, University of Surrey, Guildford, Surrey GU2 5XH, England
We have investigated the exciton spin dynamics in strained InxGa1-x As/GaAs (x ≤ 0.2) quantum wells. The variation of the initial polarization with the excitation energy is well correlated with the increasing mixing of the valence band states. The time behavior of the depolarization curves clearly demonstrates the prime importance of the hole and exciton spin relaxation processes.
© EDP Sciences 1993