Symmetry and optical properties of wurtzite nanostructures with the c-axis in the layer plane1
Tronc P.1
1Laboratoire d' Optique Physique, Ecole Superieure de Physique et Chimie Industrielles, Paris, France CRHEA--CNRS, Valbonne, France
Email: tronc@optique.espci.fr
Выставление онлайн: 19 сентября 2008 г.
In wurtzite-based quantum wells and superlattices with the c-axis parallel to the layer plane, the plane is parallel to either a summetry plane of the wurtzite lattice (type I structures, the <1120> growth direction) or a glide plane containing the c-axis (type II structures, the < 1010> growth direction). In both cases, the space symmetry of the structure depends on the parity of the number of monolayers within the slab(s). The point symmetry is C2v except for the type II structures with odd monolayer number(s). The latter structures have the sigmav point symmetry and can present a built-in electric field. Quite different selection rules, depending on the structure symmetry, govern electron optical transitions and exciton radiative recombination. This work has been supported by the 11156RF and 16254YE grants from the Minist`ere des Affaires Etrang`eres (France). PACS: 02.20.-a, 61.46.-w, 78.67.-n
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