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Plasmon-Enhanced Surface Photovoltage of ZnO/Ag Nanogratings.

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.

SUBMITTER: Gwon M

PROVIDER: S-EPMC4645158 | biostudies-other | 2015

REPOSITORIES: biostudies-other

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Plasmon-Enhanced Surface Photovoltage of ZnO/Ag Nanogratings.

Gwon Minji M Sohn Ahrum A Cho Yunae Y Phark Soo-Hyon SH Ko Jieun J Sang Kim Youn Y Kim Dong-Wook DW

Scientific reports 20151116

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, t ...[more]

PMID: 26567529

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