Optical spin orientation of a single manganese atom in a quantum dot

Details Optical spin orientation of a single manganese atom in a quantum dot Optical spin orientation of a single manganese atom in a quantum dot

2008-11-13

arxiv.org/abs/0811.2165v1

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

A hight degree of spin polarization is achieved for a Mn atom localized in a semiconductor quantum dot using quasi-resonant optical excitation at zero magnetic field. Optically created spin polarized carriers generate an energy splitting of the Mn spin and enable magnetic moment orientation controlled by the photon helicity and energy. The dynamics and the magnetic field dependence of the optical pumping mechanism shows that the spin lifetime of an isolated Mn atom at zero magnetic field is controlled by a magnetic anisotropy induced by the built-in strain in the quantum dots.

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