Plasmon-Enhanced Surface Photovoltage of ZnO/Ag Nanogratings

被引：0
作者：
Minji Gwon
Ahrum Sohn
Yunae Cho
Soo-Hyon Phark
Jieun Ko
Youn Sang Kim
Dong-Wook Kim
机构：
[1] Ewha Womans University,Department of Physics
[2] Center for Correlated Electron Systems,Department of Physics and Astronomy
[3] Institute for Basic Science (IBS),undefined
[4] Seoul National University,undefined
[5] Program in Nano Science and Technology,undefined
[6] Graduate School of Convergence Science and Technology,undefined
[7] Seoul National University,undefined
[8] Advanced Institutes of Convergence Technology,undefined
来源：
Scientific Reports | / 5卷
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摘要：
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.
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