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arXiv · 1106.6282

Coherent optical control of the spin of a single hole in a quantum dot

T. M. Godden·J. H. Quilter·A. J. Ramsay·Yanwen Wu·P. Brereton·S. J. Boyle·I. J. Luxmoore·J. Puebla-Nunez·A. M. Fox·M. S. Skolnick
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Abstract

We demonstrate coherent optical control of a single hole spin confined to an InAs/GaAs quantum dot. A superposition of hole spin states is created by fast (10-100 ps) dissociation of a spin-polarized electron-hole pair. Full control of the hole-spin is achieved by combining coherent rotations about two axes: Larmor precession of the hole-spin about an external Voigt geometry magnetic field, and rotation about the optical-axis due to the geometric phase shift induced by a picosecond laser pulse resonant with the hole-trion transition.

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T. M. Godden, J. H. Quilter, A. J. Ramsay, Yanwen Wu, P. Brereton, S. J. Boyle, I. J. Luxmoore, J. Puebla-Nunez, A. M. Fox, M. S. Skolnick. 2012-01-06. Coherent optical control of the spin of a single hole in a quantum dot. https://doi.org/10.1103/physrevlett.108.017402

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