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Optically tunable nuclear magnetic resonance in a single quantum dot

By M.N. Makhonin, E.A. Chekhovich, P. Senellart, A. Lemaitre, M.S. Skolnick and A.I. Tartakovskii


We report optically detected nuclear magnetic resonance (ODNMR) measurements on small ensembles of nuclear spins in single GaAs quantum dots. Using ODNMR we make direct measurements of the inhomogeneous Knight field from a photoexcited electron which acts on the nuclei in the dot. The resulting shifts of the NMR peak can be optically controlled by varying the electron occupancy and its spin orientation, and lead to strongly asymmetric line shapes at high optical excitation. The all-optical control of the NMR line shape will enable position-selective control of small groups of nuclear spins inside a dot

Publisher: American Physical Society
Year: 2010
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