Interband absorption and luminescence in small quantum dots under strong magnetic fields
Augusto Gonzalez, Eduardo Menendez-Proupin
Abstract
Interband absorption and luminescence of quasi-two-dimensional, circularly symmetric, Ne electron quantum dots are studied at high magnetic fields, 8<B<60 T, and low temperatures, T<<2 K. In the Ne=0 and 1 dots, the initial and final states of such processes are fixed, and thus the dependence on B of peak intensities is monotonic. For larger systems, ground state rearrangements with varying magnetic field lead to substantial modifications of the absorption and luminescence spectra. Collective effects are seen in the Ne=2 and 3 dots at "filling factors" 1/2, 1/3 and 1/5.
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