Raman spectral study of silicon nanowires: High-order scattering and phonon confinement effects

摘要: Raman-scattering spectra of silicon nanowires (SiNW's) with different diameters were obtained at room temperature, The Raman peaks SiNW's found to shift and broaden decreasing diameter the SiNW's, In addition fundamental phonon modes, overtone combination modes also observed identified according selection rules bands. A confinement model was used explain experimental results modes. show that effect becomes more obvious when SiNW is less than 22 nm. present should be benefit applications SiNW's.