Surface-plasmon-mediated emission from glancing-angle-deposition-functionalized ZnO nanowires

摘要

Vertically oriented ZnO nanowires (NWs) are grown upon silicon substrates using a novel, modified vapor-solidmethod. Electron-beam evaporation is then used to functionalize the sides of the ZnO NWs with MgO:Ag via glancingangle deposition (GLAD). By varying the thickness of the deposited MgO insulating layer, it is possible to study theunderlying energetic mechanisms responsible for the quenching and enhancement of ZnO photoluminescence centers.For the visible emission, strong quenching was observed to occur independently of the MgO thickness. In contrast, theband-edge emission displayed an enhancement factor of 19 as the thickness of the MgO spacer was increased.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.