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Coherent spin dynamics of donor bound electrons in GaAs
Journal article   Open access   Peer reviewed

Coherent spin dynamics of donor bound electrons in GaAs

Carey Phelps, Shannon O'Leary, John Prineas and Hailin Wang
Physical review. B, Condensed matter and materials physics, Vol.84(8), 085205
08/24/2011
DOI: 10.1103/PhysRevB.84.085205
url
https://doi.org/10.1103/PhysRevB.84.085205View
Published (Version of record) Open Access

Abstract

We report experimental studies of coherent spin dynamics of donor-bound electrons in high-purity GaAs by using transient differential transmission. The donor-bound exciton transitions, which are not visible in the linear absorption spectrum, are spectrally resolved in the nonlinear differential transmission spectra. The spin beats in the transient differential transmission response, arising from electron spin precession in an external magnetic field, are investigated with the pump and probe coupling to various donor-bound exciton transitions. The spectral dependence of the spin beats provides important information on the polarization selection rule for the underlying donor-bound exciton transitions. The polarization selection rules deduced from these experiments indicate that contributions from higher-energy donor-bound exciton transitions can severely limit the effectiveness of optical spin control using mechanisms such as polarization-dependent optical Stark shifts.
 Materials Science Physical Sciences Physics Technology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Science & Technology

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