Far-infrared spectra of lateral quantum dot molecules

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2006
Major/Subject
Mcode
Degree programme
Language
en
Pages
27/1-18
Series
New Journal of Physics, Volume 8, Issue 2
Abstract
We study effects of electron–electron interactions and confinement potential on the magneto-optical absorption spectrum in the far-infrared (FIR) range of lateral quantum dot molecules (QDMs). We calculate FIR spectra for three different QDM confinement potentials. We use an 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 non-parabolic quantum dots (QDs) by changing the number of confined electrons. We also calculate FIR spectra for up to six non-interacting electrons and observe some additional features in the spectrum.
Description
Keywords
quantum dots, far-infrared spectrum
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Citation
Helle, M. & Harju, A. & Nieminen, Risto M. 2006. Far-infrared spectra of lateral quantum dot molecules. New Journal of Physics. Volume 8, Issue 2. 27/1-18. ISSN 1367-2630 (printed). DOI: 10.1088/1367-2630/8/2/027.