Figure 1
Structural analysis and photoluminescence of AlGaAs core-shell nanowires. (a) Transmission electron microscopy image of an Al0.6Ga0.4As nanowire showing only a few short zincblende insertions in otherwise pure wurtzite crystal structure. (b) Higher resolution measurement of the same nanowire in (a), with different microscopy parameters to enhance the visibility of the core-shell structure. Inset: diffraction pattern of the nanowire clearly showing pure wurtzite phase. (c) Scanning micro-photoluminescence measurement, showing the integrated emission of a large number of nanowires at 2 K. The spectrum shows two peaks that we attribute to shell and core emission.
