Ultrafast Dynamic Control of Spin and Charge Density Oscillations in a GaAs Quantum Well

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.

References in corpus (2)

• Intersubband spin-density excitations in quantum wells with Rashba spin splitting
• Observation of soft magnetorotons in bilayer quantum Hall ferromagnets

Cited by in corpus (4)

• Time-dependent Kohn-Sham theory with memory
• Control of spin dynamics with laser pulses: Generation of entangled states of donor-bound electrons in a Cd1-xMnxTe quantum well
• Probing the electron-phonon interaction in correlated systems with coherent lattice fluctuation spectroscopy
• Chirality and intrinsic dissipation of spin modes in two-dimensional electron liquids