Interference effects in the resonance Raman scattering from Cd_(1-x)Zn_xS nanoparticles

摘要

Resonance Raman scattering is a powerful technique for studying electron phonon interaction and electronic structure of semiconductors [1]. The resonance behaviour of the optical phonon Raman scattering efficiency in the vicinity of electronic critical points provide information about participating electronic energy levels [2]. Interference effects in the resonance Raman spectra arise due to presence of more than one scattering mechanisms which have polarizability amplitudes of opposite signs [3] such as those of allowed and forbidden impurity induced LO phonon Raman scattering in GaAs near E_0+Δ_0 gap. The interference effects often lead to strongly asymmetric resonance profiles. In the present work we report resonance Raman scattering study of Cd_(1-x)Zn_xS nanoparticles dispersed in glass host.