Laboratory of Physics and Chemistry of Nano-Objects ; INSA-CNRS
135 avenue de Rangueil, 31077 Toulouse cedex 4, France
The manipulation of carrier spins in semiconductor quantum dots (QD) is an important step towards future spintronic or quantum information processing applications. This approach is attractive since a long coherence time is expected, as a result of the inhibition of classical spin relaxation mechanisms : the discrete energy levels in semiconductor quantum dots and the corresponding lack of energy dispersion lead to a slowdown of the spin relaxation processes compared to bulk or two-dimensional structures.
We have studied the spin dynamics of electrons, holes, neutral and charged excitons in undoped and doped QD by time-resolved photoluminescence1-6 .
We will give a review of our recent experimental results on optical spin injection in InAs/GaAs quantum dots. The possibility of dynamical polarization of nuclei in InAs QD will be also discussed 7-9.