Hole spin initialization in Quantum Dots by a periodic train of short pulses - Archive ouverte HAL
Communication Dans Un Congrès Année : 2010

Hole spin initialization in Quantum Dots by a periodic train of short pulses

Résumé

We model pump-probe experiments leading to the all-optical initialization of the hole spin of a p-doped InAs/GaAs quantum dots ensemble. We consider selection rules of mixed hole states and include periodic excitation conditions. Hyperfine interaction is taken into account as the common decoherence mechanism for the spins of electrons and holes. We show that the degree of hole spin polarization can be maximized by quenching the action of the hole hyperfine interaction with a small applied magnetic field. However additional hole spin relaxation mechanisms, in the microsecond time range, determine the absolute value of this maximum.

Dates et versions

hal-01229226 , version 1 (16-11-2015)

Identifiants

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Benoît Eble, Pascal Desfonds, F. Fras, Frédéric Bernardot, Christophe Testelin, et al.. Hole spin initialization in Quantum Dots by a periodic train of short pulses. 11TH INTERNATIONAL CONFERENCE ON OPTICS OF EXCITONS IN CONFINED SYSTEMS (OECS11), 2010, DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND, Unknown Region. ⟨10.1088/1742-6596/210/1/012031⟩. ⟨hal-01229226⟩
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