• F. Heisterkamp
  • A. Greilich
  • E. A. Zhukov
  • E. Kirstein
  • T. Kazimierczuk
  • V. L. Korenev
  • I. A. Yugova
  • A. Pawlis
  • M. Bayer

Optically induced nuclear spin polarization in a fluorine-doped ZnSe epilayer is studied by time-resolved Kerr rotation using resonant excitation of donor-bound excitons. Excitation with helicity-modulated laser pulses results in a transverse nuclear spin polarization, which is detected as a change of the Larmor precession frequency of the donor-bound electron spins. The frequency shift in dependence on the transverse magnetic field exhibits a pronounced dispersion-like shape with resonances at the fields of nuclear magnetic resonance of the constituent zinc and selenium isotopes. It is studied as a function of external parameters, particularly of constant and radio frequency external magnetic fields. The width of the resonance and its shape indicate a strong spatial inhomogeneity of the nuclear spin polarization in the vicinity of a fluorine donor. A mechanism of optically induced nuclear spin polarization is suggested based on the concept of resonant nuclear spin cooling driven by the inhomogeneous Knight field of the donor-bound electron.

Original languageEnglish
Article number245441
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number24
DOIs
StatePublished - 28 Dec 2015

    Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

ID: 73304829