000213949 001__ 213949
000213949 005__ 20180913063439.0
000213949 0247_ $$2doi$$a10.1103/PhysRevB.92.205303
000213949 022__ $$a1098-0121
000213949 02470 $$2ISI$$a000364408300007
000213949 037__ $$aARTICLE
000213949 245__ $$aSymmetries and optical transitions of hexagonal quantum dots in GaAs/AlGaAs nanowires
000213949 260__ $$aCollege Pk$$bAmer Physical Soc$$c2015
000213949 269__ $$a2015
000213949 300__ $$a21
000213949 336__ $$aJournal Articles
000213949 520__ $$aWe investigate the properties of electronic states and optical transitions in hexagonal GaAs quantum dots within Al0.3Ga0.7As nanowires, grown in axial direction [111]. Such dots are particularly interesting due to their high degree of symmetry. A streamlined postsymmetrization technique based on class operators (PTCO) is developed which enables one to benefit from the insight brought by the maximal symmetrization and reduction of fields (MSRF) approach reported by Dalessi et al. [Phys. Rev. B 81, 125106 (2010)], after having solved the Schrodinger equation. Definite advantages of the PTCO are that it does not require modification of existing code for the calculation of the electronic structure, and that it allows to numerically test for elevated symmetries. We show in the frame of a four-band k . p model that despite the fact that the D-6h symmetry of the nanostructure is broken at the microscopic level by the underlying zinc-blende crystal structure, the effect is quite small. Most of the particularities of the electronic states and their optical emission can be understood by symmetry elevation to D-6h and the presence of approximate azimuthal and radial quantum numbers.
000213949 700__ $$aSvendsen, Guro K.$$uNorwegian Univ Sci & Technol, Dept Elect & Telecommun, N-7034 Trondheim, Norway
000213949 700__ $$aSkaar, Johannes$$uNorwegian Univ Sci & Technol, Dept Elect & Telecommun, N-7034 Trondheim, Norway
000213949 700__ $$0240822$$aWeman, Helge$$g111203$$uNorwegian Univ Sci & Technol, Dept Elect & Telecommun, N-7034 Trondheim, Norway
000213949 700__ $$0240820$$aDupertuis, Marc-Andre$$g105021
000213949 773__ $$j92$$k20$$q205303$$tPhysical Review B
000213949 909C0 $$0252003$$pLOEQ$$xU10156
000213949 909CO $$ooai:infoscience.tind.io:213949$$pSB$$particle
000213949 917Z8 $$x105021
000213949 937__ $$aEPFL-ARTICLE-213949
000213949 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000213949 980__ $$aARTICLE