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Fig. 3 | Nanoscale Research Letters

Fig. 3

From: Strained GaAs/InGaAs Core-Shell Nanowires for Photovoltaic Applications

Fig. 3

(color online) (a) Micro-Raman spectra obtained from three different points along a single GaAs/InGaAs core-shell nanowire with ≈50-nm shell thickness. The Raman spectrum of a GaAs (111)B substrate is also plotted as reference. b Optical microscope images indicating the three points on the nanowire from which the Raman spectra are obtained. c SEM image showing details of the same nanowire in higher resolution

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