  In this letter, we study how coupling between AuNPs and ZnO thin films
affects their emission properties. The emission intensity of ZnO thin films
changes when Al2O3 spacer layer of different thickness are included in ZnO/Au
films, consistent with theoretical predictions. The emission properties are
also controlled using the polarization of the excitation source. Emission
properties depended on the polarization of the excitation source because of the
surface plasmon resonance of AuNPs. The photoluminescence anisotropy of these
systems shows that enhanced photoluminescence can be achieved through coupling
of the emission from ZnO with the surface plasmon resonance of AuNPs.
