In this paper, we have created highly uniform one-dimensional single (In,Ga)As QD arrays on planar GaAs (100) substrates by self-organized anisotropic strain engineering of an (In,Ga)As/GaAs quantum wire (QWR) superlattice (SL) template. During molecular beam epitaxy (MBE) of a strained (In,Ga)As/GaAs SL, elongated (In,Ga)As QDs develop into uniform QWR arrays with well-defined lateral periodicity. QWR formation relies on the anisotropic adatom surface migration and in desorption during annealing of the layers of elongated QDs after capping with a thin GaAs layer. The formation of highly uniform (In,Ga)As QD arrays with excellent PL properties is attributed to the smoothness of the strain field modulation on the dot-diameter and dot-to-dot distance length scales.


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    Title :

    Ordered quantum dot arrays on self-organized strain engineered templates


    Contributors:
    Notzel, R. (author) / Mano, T. (author) / Wolter, J.H. (author)


    Publication date :

    2003-01-01


    Size :

    137788 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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