174 citations · 369 across the 4 of their papers we have counts for
3 papers · 1 filter
Ellipsometric study of the Electronic Structure of GaMnAs and LT-GaAs
K. S. Burch, J. Stephens, R. K. Kawakami +2
We have measured the optical constants of GaMnAs from 0.62 eV to 6 eV, using spectroscopic ellipsometry. The second derivatives of the dielectric function are examined through a cr…
Optically-patterned nuclear doughnuts in GaAs/MnAs heterostructures
J. Stephens, J. Berezovsky, R. K. Kawakami +2
We demonstrate a scheme for optically patterning nuclear spin polarization in semiconductor/ferromagnet heterostructures. A scanning time-resolved Kerr rotation microscope is used…
Spin accumulation in forward-biased MnAs/GaAs Schottky diodes
J. Stephens, J. Berezovsky, J. P. McGuire +3
We describe a new means for electrically creating spin polarization in semiconductors. In contrast to spin injection of electrons by tunneling through a reverse-biased Schottky bar…