Nuclear spin polarization dynamics are measured in optically pumped individual $\text{GaAs}/{\text{Al}}_{x}{\text{Ga}}_{1\ensuremath{-}x}\text{As}$ interface quantum dots by detecting the time dependence of the Overhauser shift in photoluminescence spectra. Long nuclear polarization decay times of $\ensuremath{\approx}1\text{ }\text{min}$ have been found indicating inefficient nuclear spin diffusion from the GaAs dot into the surrounding AlGaAs matrix in externally applied magnetic field. A spin-diffusion coefficient two orders lower than that previously found in bulk GaAs is deduced.
A. B. Van’kov合作论文数1Maxim Makhonin合作论文数Department of Physics and Astronomy, Faculty of Science, The University of Sheffield1
Aristide Lemaître合作论文数Centre for Nanoscienceand Nanotechnology, Centre National de la Recherche Scientifique;Université Paris-Saclay1
Alexander Tartakovskii合作论文数School of Mathematical and Physical Sciences, University of Sheffield;Near-Field Optical Imaging and Spectroscopy Centre, University of Sheffield1
Ilias Drouzas合作论文数1
David Martrou合作论文数LPN CNRS1
Pascale Senellart合作论文数Center for Nanoscience and Nanotechnology, French National Centre for Scientific Research;École Polytechnique;Quandela1
Joanna Skiba-Szymanska合作论文数Toshiba Research Europe Limited1
Maurice Skolnick合作论文数School of Mathematical and Physical Sciences, University of Sheffield;Low Dimensional Structures and Devices, Department of Physics and Astronomy, The University of Sheffield1
Evgeny Chekhovich合作论文数Department of Physics and Astronomy, Faculty of Science, The University of Sheffield1
