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Optical Pumping of the Electronic and Nuclear Spin of Single Charge-Tunable Quantum Dots
2005
Physical Review Letters
We present a comprehensive examination of optical pumping of spins in individual GaAs quantum dots as we change the charge from positive to neutral to negative using a Schottky diode. We observe that photoluminescence polarization memory has the same sign as the net charge of the dot. Optical pumping of ground state electron spins enhances this effect, as demonstrated through the first measurements of the Hanle effect on an individual quantum dot. With the Overhauser effect in a high
doi:10.1103/physrevlett.94.047402
pmid:15783594
fatcat:pex5slgncfgkdkzpvteo5loeoq