2007/10/31 by A. J. Ramsay, S. J. Boyle, R. S. Kolodka +6
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.100.197401
published as Phys. Rev. Lett. 100 197401 (2008) · 5 pages, 3 figures, resubmitted to PRL, changes due to referee comments
arxiv created 2008/03/18 · arxiv updated 2009/12/01
We propose and demonstrate the sequential initialization, optical control, and read-out of a single spin trapped in a semiconductor quantum dot. Hole spin preparation is achieved through ionization of a resonantly excited electron-hole pair. Optical control is observed as a coherent Rabi rotation between the hole and charged exciton states, which is conditional on the initial hole spin state. The spin-selective creation of the charged exciton provides a photocurrent read-out of the hole spin state.