Abstract
The results of experimental studies concerning the optical polarization anisotropy of electroluminescence and absorption spectra of systems with a varied number of tunnel-coupled vertically correlated In(Ga)As/GaAs quantum dots (QDs), built into a double-section laser with equal-length sections, are presented. One such system is a QD superlattice exhibiting the Wannier-Stark effect. The involvement of heavyhole ground states in optical transitions for light polarized both in the plane perpendicular to the growth axis (X-Y) and along the growth direction Z of the structure was observed. The degree of polarization anisotropy depends on the height of vertically correlated QDs and the QD superlattice: the total thickness of all In(Ga)As QD layers and GaAs spacers between the QDs, which is related to the Z component of the wave function of heavy-hole ground states for vertically correlated QDs and for the QD superlattice.
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Original Russian Text © M.M. Sobolev, I.M. Gadzhiyev, I.O. Bakshaev, V.N. Nevedomskiy, M.S. Buyalo, Yu.M. Zadiranov, R.V. Zolotareva, E.L. Portnoi, 2012, published in Fizika i Tekhnika Poluprovodnikov, 2012, Vol. 46, No. 1, pp. 96–102.
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Sobolev, M.M., Gadzhiyev, I.M., Bakshaev, I.O. et al. Polarization dependences of electroluminescence and absorption of vertically correlated InAs/GaAs QDs. Semiconductors 46, 93–98 (2012). https://doi.org/10.1134/S1063782612010186
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DOI: https://doi.org/10.1134/S1063782612010186