Figure 6.

(a) y-Offset plots of Raman spectra of a 4.8 nm period GaAs/GaP SL NW obtained with 488 nm(violet), 514 nm (green), 561 nm (orange), and 633 nm (red). The individual spectra are normalized using CaF₂ Raman intensity for the given excitation wavelength; (b) ratio of intensity of GaP-like mode around 356 cm^–1 to intensity of GaAs-like mode around 276 cm^–1 as a function of excitation wavelength; (c) intensities (normalized with CaF₂ intensity) of different phonon modes as a function of the Raman shift extracted from (a) with same color scheme as in (a); (d) intensities (normalized with CaF₂ intensity) of different phonon modes as a function of the Raman shift for a reference NW, with same color scheme as in (a).