PMID: 15245181Jul 13, 2004Paper

Ultrafast dynamic control of spin and charge density oscillations in a GaAs quantum well

Physical Review Letters
J M BaoR Merlin

Abstract

We use subpicosecond laser pulses to generate and monitor in real time collective oscillations of electrons in a modulation-doped GaAs quantum well. The observed frequencies match those of intersubband spin- and charge-density excitations. Light couples to coherent density fluctuations through resonant stimulated Raman scattering. Because the spin- and charge-related modes obey different selection rules and resonant behavior, the amplitudes of the corresponding oscillations can be independently controlled by using shaped pulses of the proper polarization.

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Citations

Feb 24, 2018·Scientific Reports·Shahrzad KarimiFlorent Perez
Jul 26, 2014·Physical Review Letters·P PadmanabhanR Merlin
May 18, 2013·Physical Review Letters·R RungsawangJ Tignon
Oct 4, 2005·Physical Review Letters·H O Wijewardane, C A Ullrich

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