Surface Plasmon Assisted Directional Rayleigh Scattering

摘要

The origin of the Rayleigh scattering ring effect has been experimentally examined on a quantum dot/metal film system,in which CdTe quantum dots embedded in PVP are spincoated on a thin Au film.On the basis of the angle-dependent,optical measurements under different excitation schemes (i.e.,wavelength and polarization),we demonstrate that surface plasmon assisted directional radiation is responsible for such an effect.Moreover,an interesting phase-shift behavior is addressed.