Fast high fidelity hole spin initialization in a single InGaAs quantum dot

Godden, T. M.; Boyle, S. J.; Ramsay, A. J.; Fox, A. M.; Skolnick, M. S.
August 2010
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p061113
Academic Journal
We demonstrate fast initialization of a single hole spin trapped in an InGaAs quantum dot with a fidelity F>99% and a 1/e time of ∼30 ps, by applying a magnetic field parallel to the growth direction. We show that the fidelity of the hole spin, prepared by ionization of a photo-generated electron-hole pair, is limited by the precession of the exciton spin due to the anisotropic exchange interaction.


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