Inhomogeneous nuclear spin polarization induced by helicity-modulated optical excitation of fluorine-bound electron spins in ZnSe

Abstract

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.

12 pages, 11 figures

References in corpus (12)

• Electron spin relaxation by nuclei in semiconductor quantum dots
• Electron spin decoherence in quantum dots due to interaction with nuclei
• Nuclear spin physics in quantum dots: an optical investigation
• Bistability of the Nuclear Polarisation created through optical pumping in InGaAs Quantum Dots
• Manipulation of the Spin Memory of Electrons in n-GaAs
• Coherent spin dynamics of electrons and holes in semiconductor quantum wells and quantum dots under periodical optical excitation: resonant spin amplification versus spin mode-locking
• Longitudinal and transversal spin dynamics of donor-bound electrons in fluorine-doped ZnSe: spin inertia versus Hanle effect
• Long-lived electron spin coherence in CdSe/ZnSSe self-assembled quantum dots
• All-optical NMR in semiconductors provided by resonant cooling of nuclear spins interacting with electrons in the resonant spin amplification regime
• Photon Antibunching and Magnetospectroscopy of a Single Fluorine Donor in ZnSe
• Multitudes of Stable States in a Periodically Driven Electron-Nuclear Spin System in a Quantum Dot
• The Knight field and the local nuclear dipole-dipole field in an (In,Ga)As quantum dot ensemble

Cited by in corpus (5)

• Spin dynamics of electrons and holes interacting with nuclei in MAPbI${}_3$ perovskite single crystals
• Dynamics of nuclear spin polarization induced and detected by coherently precessing electron spins in fluorine-doped ZnSe
• Dynamic Nuclear Polarization by optical Stark effect in periodically-pumped gallium arsenide
• Observation of magnetic-field-sweep-direction-dependent dynamic nuclear polarization under periodic optical electron spin pumping
• Nuclear spin dynamics influenced and detected by electron spin polarization in CdTe/CdMgTe quantum wells