Far-infrared spectra of lateral quantum dot molecules

Details Far-infrared spectra of lateral quantum dot molecules Far-infrared spectra of lateral quantum dot molecules

2005-11-23

arxiv.org/abs/cond-mat/0511577v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

For better quality Figs download manuscript from http://www.fyslab.hut.fi/~mma/FIR/Helle_qdmfir.ps.gz

Scientific paper

10.1088/1367-2630/8/2/027

We study effects of electron-electron interactions and confinement potential on the magneto-optical absorption spectrum in the far-infrared range of lateral quantum dot molecules. We calculate far-infrared (FIR) spectra for three different quantum dot molecule confinement potentials. We use accurate exact diagonalization technique for two interacting electrons and calculate dipole-transitions between two-body levels with perturbation theory. We conclude that the two-electron FIR spectra directly reflect the symmetry of the confinement potential and interactions cause only small shifts in the spectra. These predictions could be tested in experiments with nonparabolic quantum dots by changing the number of confined electrons. We also calculate FIR spectra for up to six noninteracting electrons and observe some additional features in the spectrum.

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