Fast optical preparation, control and read-out of single quantum dot spin

Details Fast optical preparation, control and read-out of single quantum dot spin Fast optical preparation, control and read-out of single quantum dot spin

2007-10-19

arxiv.org/abs/0710.3738v3

Phys. Rev. Lett. 100 197401 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures, resubmitted to PRL, changes due to referee comments

Scientific paper

10.1103/PhysRevLett.100.197401

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.

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