Spacer Thickness Dependence of Photoluminescence and Raman Scattering Spectra in Au/Spacer/CdSe-Nanoparticle Multilayers

We report photoluminescence (PL) and Raman scattering (RS) spectra in Au/spacer/CdSe-nanoparticle multilayers as a function of the distance between the Au film and the CdSe-nanoparticle monolayer. Both the PL and RS intensities were enhanced when the Au-CdSe distance was large and decreased with a decrease in distance. The influence of the localized surface plasmons on the optical properties of the CdSe nanoparticles is discussed. PACS: 78.67.Bf; 78.30.Fs; 78.55.Et