Fabrication of Axial and Radial Heterostructures for Semiconductor Nanowires by Using Selective-Area Metal-Organic Vapor-Phase Epitaxy

Figure 25

Images of optically pumped single GaAs/GaAsP core-shell nanowire lasers and PL spectra. (a) Schematic of nanowire sample excited by laser beam. (b) CCD camera image of luminescence from nanowire. Inset at bottom right is SEM image of 5.5-μm-long nanowire. (c) PL spectra from single GaAs/GaAsP core-shell nanowire with length of 5.5 μm, as function of increasing excitation power density at 4.2 K [32].