Resonant low-frequency Raman scattering in CdS-doped glasses

Resonant low-frequency Raman scattering experiments performed on CdS-doped glasses reveal two kinds of peaks: the first one is due to the entire nanoparticle distribution and is observed for excitation below the absorption structures of the nanoparticles. The second peak is observed when exciting resonantly the nanoparticles and is due to the resonantly excited nanoparticles only; this is a size selective excitation.