title: 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.
authors.affiliation: Department of Physics, Ewha Womans University, Seoul 120750, Korea.
authors.forename: Minji
authors.initials: M
authors.lastname: Gwon
authors.affiliation: Department of Physics, Ewha Womans University, Seoul 120750, Korea.
authors.forename: Ahrum
authors.initials: A
authors.lastname: Sohn
authors.affiliation: Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea.
authors.forename: Yunae
authors.initials: Y
authors.lastname: Cho
authors.affiliation: Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea.|Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea.
authors.forename: Soo-Hyon
authors.initials: SH
authors.lastname: Phark
authors.affiliation: Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 151-742, Korea.
authors.forename: Jieun
authors.initials: J
authors.lastname: Ko
authors.affiliation: Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 151-742, Korea.|Advanced Institutes of Convergence Technology, Suwon, Gyeonggi-do 443-270, Korea.
authors.forename: Youn
authors.initials: Y
authors.lastname: Sang Kim
authors.affiliation: Department of Physics, Ewha Womans University, Seoul 120750, Korea.
authors.forename: Dong-Wook
authors.initials: DW
authors.lastname: Kim