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- Title
Plasmon-Enhanced Surface Photovoltage of ZnO/Ag Nanogratings.
- Authors
Phark, Soo-Hyon; Sang Kim, Youn; Gwon, Minji; Sohn, Ahrum; Kim, Dong-Wook; Cho, Yunae; Ko, Jieun
- Abstract
We investigated the surface photovoltage (SPV) behaviors of ZnO/Ag one-dimensional (1D) nanogratings using Kelvin probe force microscopy (KPFM). The grating structure could couple surface plasmon polaritons (SPPs) with photons, giving rise to strong light confinement at the ZnO/Ag interface. The larger field produced more photo-excited carriers and increased the SPV. SPP excitation influenced the spatial distribution of the photo-excited carriers and their recombination processes. As a result, the SPV relaxation time clearly depended on the wavelength and polarization of the incident light. All of these results suggested that SPV measurement using KPFM should be very useful for studying the plasmonic effects in nanoscale metal/semiconductor hybrid structures.
- Subjects
SURFACE photovoltage; OPTICAL gratings; SURFACE plasmons; POLARITONS; KELVIN probe force microscopy; ELECTRON energy loss spectroscopy; OPTICAL properties of zinc oxide
- Publication
Scientific Reports, 2015, p16727
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep16727