Investigation of the formation of InAs QDs in a AlGaAs matrix

D. S. Sizov; N. V. Kryzhanovskaya; A. G. Gladyshev; Yu B. Samsonenko; G. E. Cirlin; N. K. Polyakov; V. A. Egorov; A. A. Tonkih; Yu G. Musikhin; Anrei F. Tsatsul'nikov; N. N. Ledentsov; Victor M. Ustinov

doi:10.1117/12.511241

11 June 2003 Investigation of the formation of InAs QDs in a AlGaAs matrix

D. S. Sizov, N. V. Kryzhanovskaya, A. G. Gladyshev, Yu B. Samsonenko, G. E. Cirlin, N. K. Polyakov, V. A. Egorov, A. A. Tonkih, Yu G. Musikhin, Anrei F. Tsatsul'nikov, N. N. Ledentsov, Victor M. Ustinov

Author Affiliations +

Proceedings Volume 5023, 10th International Symposium on Nanostructures: Physics and Technology; (2003) https://doi.org/10.1117/12.511241
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

Abstract

Optical and structural properties of self organized InGaAs quantum dots (QD), deposited in Al_0.3Ga_0.7As matrix, were investigated. Samples were grown by molecular-beam epitaxy (MBE). It is shown, that deposition of 1.7 - 4 monolayer of InAs on Al_0.3Ga_0.7As surface results in formation of nanoscale QDs on 1 - 2 monolayer thick wetting layer (Stranski-Krastanov growth mode). Large exciton localization energy of the InAs QDs in Al_0.3Ga_0.7As in compare with QDs in GaAs is demonstrated. This is due to increase in size of these QDs and significant bandgap offset in the case of InAs/AlGaAs system in compare with InAs/GaAs one.

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D. S. Sizov, N. V. Kryzhanovskaya, A. G. Gladyshev, Yu B. Samsonenko, G. E. Cirlin, N. K. Polyakov, V. A. Egorov, A. A. Tonkih, Yu G. Musikhin, Anrei F. Tsatsul'nikov, N. N. Ledentsov, and Victor M. Ustinov "Investigation of the formation of InAs QDs in a AlGaAs matrix", Proc. SPIE 5023, 10th International Symposium on Nanostructures: Physics and Technology, (11 June 2003); https://doi.org/10.1117/12.511241

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