For our discussion we start from the work by , which is displaying the Raman spectra of silicon carbide in the form of small particles and nanowires. It is observed that SiC has the main Raman peaks centred at 796 and 973 cm -1 . The first peak corresponds to the transverse optic (TO) mode, the second to the longitudinal optic (LO) mode. "The LO band has its intensity dependent on the wavelength of the incident laser". If a 514 nm laser excitation is used, "the LO band had its intensity similar to that of the TO band, but when the 780 nm laser was used, the LO band had intensity much smaller than the TO peak" .