Phys. Rev. Lett. 100, 197401 (2008) [4 pages]Fast Optical Preparation, Control, and Readout of a Single Quantum Dot SpinReceived 4 September 2007; published 13 May 2008 We propose and demonstrate the sequential initialization, optical control, and readout 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 readout of the hole spin state. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.197401
DOI:
10.1103/PhysRevLett.100.197401
PACS:
78.67.Hc, 42.50.Hz, 71.35.Pq
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