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Magneto‐optics of layers of triple quantum dot molecules
Author(s) -
Le Minh Thu,
Voskoboynikov Oleksandr
Publication year - 2009
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200880595
Subject(s) - quantum dot , observable , molecule , condensed matter physics , physics , magneto , quantum , magnetic field , molecular physics , optics , materials science , optoelectronics , quantum mechanics , magnet
We consider theoretically the impact of the coherent manipulation of electronic states in the triple vertical lens‐shaped circular InAs/GaAs quantum dot molecules on the collective magneto‐optical reflection from layers of those nano‐objects. The quantum dots have substantially different diameters in contrast to most of the known simulations. We demonstrate a possibility to drive molecular electronic ground states (to redistribute electronic wave functions within the molecule) by applying an external magnetic field along the system's growth direction. The change in the states leads to the redistribution of the intensity of the reflectance and absorbance peaks in the collective magneto‐optical response of a layer of the triple quantum dot molecules. Varying the distance between quantum dots within the layer one can study optically the transition from “molecular” to “atomic” configuration. We show that the changes in the quantum mechanical behaviour of the molecules can be made observable by monitoring changes of the ellipsometric parameters Ψ and Δ in the magneto‐optical response of layers of such nano‐objects. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)