Ultrafast Hole-Spin Dynamics in Optically Excited Bulk GaAReportar como inadecuado



 Ultrafast Hole-Spin Dynamics in Optically Excited Bulk GaA


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We present experimental and theoretical results on hole-spin dynamics in bulk GaAs after ultrafast optical excitation. The experimental differential transmission are compared with a dynamical calculation of the momentum-resolved hole distributions, which includes the carrier-carrier, carrier-phonon and carrier-impurity interaction at the level of Boltzmann scattering integrals. We obtain good agreement with the experimentally determined hole-spin relaxation times, but point out that depending on how the spin-polarization dynamics is extracted, deviations from an exponential decay at short times occur. We also study theoretically the behavior of the spin-relaxation for heavily p-doped GaAs at low temperatures.



Autor: Michael Krauss; David J. Hilton; Hans Christian Schneider

Fuente: https://archive.org/







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