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Optical Pumping of the Electronic and Nuclear Spin of Single Charge-Tunable Quantum Dots

A. Bracker, E. Stinaff, D. Gammon, M. Ware, J. Tischler, A. Shabaev, Al. Efros, D. Park, D. Gershoni, V. Korenev, I. Merkulov
2005 Physical Review Letters  

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2004 pre-print
arXiv:cond-mat/0408466v1 fatcat:bbceitxlqveipll2gjyfdpw52y
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
more » ... l magnetic field, we demonstrate efficient optical pumping of the quantum dot's nuclear spins for all three charge states.
doi:10.1103/physrevlett.94.047402 pmid:15783594 fatcat:pex5slgncfgkdkzpvteo5loeoq
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A. Bracker, E. Stinaff, D. Gammon, M. Ware, J. Tischler, A. Shabaev, Al. Efros, D. Park, D. Gershoni, V. Korenev, I. Merkulov. "Optical Pumping of the Electronic and Nuclear Spin of Single Charge-Tunable Quantum Dots." Physical Review Letters 94.4 (2005)