Fast optical control of spin dynamics in a quantum wire

Abstract

The spin dynamics in a quantum wire with a Rashba spin orbit interaction (SOI) is shown to be controllable via sub-picosecond electromagnetic pulses shaped appropriately. If the light polarization vector is along the wire's direction, the carriers experience a momentum boost while the phase coherence in different spin channels is maintained, a fact exploitable to control the speed of a photo-driven spin field effect transistor. A photon pulse with a polarization vector perpendicular to the wire results in a spin precession which is comparable to that due to the Rashba SOI and is tunable by the pulse field parameters, an effect utilizable in optically controlled spintronics devices.

6 pages, 3 figures

References in corpus (2)

• Revivals, collapses and magnetic-pulse generation in quantum rings
• Photo-induced, non-equilibrium spin and charge polarization in quantum rings

Cited by in corpus (5)

• Spin dynamics in a strongly driven system: very slow Rabi oscillations
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• Quantum states and linear response in dc and electromagnetic fields for charge current and spin polarization of electrons at Bi/Si interface with giant spin-orbit coupling