Fig. 5
Structural and optical properties of heterostructure growth on [100] nanowire facets. Schematics and cross-section transmission electron microscopy (TEM) images of (a) separated InGaAs shell plates grown on a predominantly {001} faceted nanowire using a high flow rate. Inset shows the indexed diffraction pattern pertaining to the TEM image. (b) InGaAs quantum wires grown on an elongated octagonal cross-sectioned nanowire with smaller {001} facets, using a high flow rate. Insets show the schematics of the radial heterostructures. (c) Room temperature PL from a single nanowire from the same sample as (b), bright emission is observed from the QWR, while InP emission is visible as a very weak peak