Coherent ultrafast spin flip in a 2D electron gas

Carey Phelps; Timothy Sweeney; Hailin Wang

Coherent ultrafast spin flip in a 2D electron gas

ORAL

Abstract

We report the experimental demonstration of ultrafast electron spin flip in a modulation doped CdTe quantum well. Complete spin flip is realized with an off-resonant laser pulse of 2 ps in duration. The effective pi-pulse flips the electron spins with respect to an axis that is orthogonal to both the external magnetic field (Voigt geometry) and the sample growth axis. The realization of the ultrafast pi-pulse opens up a new avenue for protecting electron spins from decoherence with dynamical decoupling.

^*This work is supported by NSF and ARL.

March 18, 2009, 9:36 AM – March 18, 2009, 9:48 AM

Authors

Carey Phelps
- Department of Physics and Oregon Center for Optics, University of Oregon, Eugene, OR 97405
Timothy Sweeney
- Department of Physics and Oregon Center for Optics, University of Oregon, Eugene, OR 97405
Hailin Wang
- Department of Physics, Oregon Center for Optics, University of Oregon, Eugene, Oregon 97403
- Department of Physics and Oregon Center for Optics, University of Oregon, Eugene, OR 97405