PMID: 19113578Dec 31, 2008Paper

Optical spin initialization and nondestructive measurement in a quantum dot molecule

Physical Review Letters
Danny KimDaniel Gammon

Abstract

The spin of an electron in a self-assembled InAs/GaAs quantum dot molecule is optically prepared and measured through the trion triplet states. A longitudinal magnetic field is used to tune two of the trion states into resonance, forming a superposition state through asymmetric spin exchange. As a result, spin-flip Raman transitions can be used for optical spin initialization, while separate trion states enable cycling transitions for nondestructive measurement. With two-laser transmission spectroscopy we demonstrate both operations simultaneously, something not previously accomplished in a single quantum dot.

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Citations

Sep 17, 2010·Nature·Mikhail D Lukin, Jacob Taylor
May 9, 2014·Scientific Reports·Clemens MatthiesenMete Atatüre
Oct 28, 2009·Nanotechnology·B AlénL González
Sep 28, 2010·Physical Review Letters·S T YilmazA Imamoğlu

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