Nuclear effects in Kerr rotation-detected magnetic resonance of electrons in GaAs

We have studied nuclear effects on electron spins in lightly doped n-GaAs bulk and quantum well samples using optically detected magnetic resonance, with the optical detection done via Kerr rotation. The magnetic resonance signal allowed us to measure the electron T 2 ∗ lifetimes and g -factors. We observed strong dynamic nuclear polarization, which was controllable via nuclear magnetic resonance techniques. We measured the nuclear spin relaxation time ( T 1 ) by monitoring the changing Overhauser field in time, and were able to perform combined electron and nuclear resonance.