# Ultrafast Manipulation of Electron Spin Coherence

@article{Gupta2001UltrafastMO,
title={Ultrafast Manipulation of Electron Spin Coherence},
author={Jay A. Gupta and Robert G. Knobel and Nitin Samarth and David D. Awschalom},
journal={Science},
year={2001},
volume={292},
pages={2458 - 2461}
}
A technique is developed with the potential for coherent all-optical control over electron spins in semiconductors on femtosecond time scales. The experiments show that optical “tipping” pulses can enact substantial rotations of electron spins through a mechanism dependent on the optical Stark effect. These rotations were measured as changes in the amplitude of spin precession after optical excitation in a transverse magnetic field and approach π/2 radians. A prototype sequence of two tipping… Expand
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