K. Akiba, S. Kanasugi, K. Nagase, Y. Hirayama
We study optically pumped nuclear polarization in a single GaAs/AlGaAs quantum well by using resistive detection. This detection provides high sensitivity and selectivity of nuclear spins in the well. The dependencies of the nuclear magnetic field on laser wavelength, power, and illumination time show the Landau level structures, the phonon contribution, and the loss process of nuclear polarization. This allows us to comprehensively understand the detailed mechanism of the optical nuclear polarization, which enables applications to an electron-spin-resolved spectroscopy, highly sensitive nuclear magnetic resonance technique, and quantum information processing.
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http://arxiv.org/abs/1206.5227
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