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 T2∗ lifetimes and gg-factors. We observed strong dynamic nuclear polarization, which was controllable via nuclear magnetic resonance techniques. We measured the nuclear spin relaxation time (T1)(T1) by monitoring the changing Overhauser field in time, and were able to perform combined electron and nuclear resonance.