Raman phonons of silicon wires

Using the Keating model and the Raman polarizability of Alben et al., the phonon Raman spectra of silicon wires are calculated. With the calculation results, the Raman spectra of porous silicon of some published papers are analyzed. Until now different authors have had different views on the luminescence mechanism of porous silicon, which may mainly result from the fact that they had different samples.