Abstract
A theoretical description of electronic Raman scattering from artificial atoms under the influence of an external magnetic field is presented. Raman spectra with laser excitation energy in the interval to are computed in the polarized and depolarized geometry. The polarization ratios for the collective and single-particle excitations indicate a breakdown of the Raman polarization selection rules once the magnetic field is switched on. A Raman intensity jump rule at the band gap is predicted in our calculations. This rule can be a useful tool for identifying the physical nature (charge or spin) of the electronic excitations in quantum dots in low magnetic fields.
- Received 3 March 2005
DOI:https://doi.org/10.1103/PhysRevB.71.241311
©2005 American Physical Society