Multiphonon Raman Spectrum of Silicon

The energy and polarization characteristics of the one- and two-phonon Raman spectrum have been measured using a 180^ backscattering technique. The two-phonon spectrum was measured at 20, 80, and 305^. The one-phonon spectrum was measured at 17, 30, 80, and 305 ^. The one-phonon line of symmetry ₂₅, was shown to be Lorentzian and to have a deconvoluted half-width at 17 ^ of 1. 45 0. 05 cm^-1. The two-phonon Raman spectrum was used to determine phonon energies at the four critical points, X, L, and W.