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

Abstract

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.

References in corpus (6)

• Optically probing the fine structure of a single Mn atom in an InAs quantum dot
• Single Electron Transport in electrically tunable nanomagnets
• Optical probing of spin fluctuations of a single magnetic atom
• Magnetization dynamics down to zero field in dilute (Cd,Mn)Te quantum wells
• Fine structure of exciton excited levels in a quantum dot with a magnetic ion
• Nonequilibrium nuclear-electron spin dynamics in semiconductor quantum dots

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