Tunability of Raman spectral signatures by Rashba spin-orbit interaction in few-electron quantum dots
Department of Physics and Astronomy, University of Manitoba - Winnipeg, Canada R3T 2N2
2 Department of Solid State Physics, Yerevan State University - Yerevan, Armenia
Accepted: 21 April 2011
The resonant inelastic light scattering from a GaAs quantum dot containing a few electrons is investigated theoretically in the presence of Rashba spin-orbit coupling. We show that the spin-orbit interaction results in additional Raman transitions in the dot, whose amplitudes can be controlled externally by varying the spin-orbit coupling parameter. This novel effect can be used to tune Raman transitions in quantum dots. Alternatively, Raman spectroscopy can be used to observe how Rashba spin-orbit coupling manifests in few-electron quantum dots.
PACS: 73.21.La – Quantum dots / 71.70.Ej – Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect / 78.30.Fs – III-V and II-VI semiconductors
© EPLA, 2011