中文摘要：

针对CdTe量子点嵌入PVP薄膜且旋涂于金膜的体系，设计了一系列光学实验，通过测量散射光环角度与激发光波长和偏振的依赖关系，证明了该效应源于表面等离激元协助的方向性发光，并发现了一种有趣的“相移”现象．

英文摘要：

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.