Plasmon-Enhanced Surface Photovoltage of ZnO/Ag Nanogratings

Minji Gwon; Ahrum Sohn; Yunae Cho; Soo Hyon Phark; Jieun Ko; Youn Sang Kim; Dong Wook Kim

doi:10.1038/srep16727

Plasmon-Enhanced Surface Photovoltage of ZnO/Ag Nanogratings

Minji Gwon, Ahrum Sohn, Yunae Cho, Soo Hyon Phark, Jieun Ko, Youn Sang Kim, Dong Wook Kim

Department of Physics

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

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.

Original language	English
Article number	16727
Journal	Scientific Reports
Volume	5
DOIs	https://doi.org/10.1038/srep16727
State	Published - 16 Nov 2015

Bibliographical note

Funding Information:
This work was supported by New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant (20123010010160) and Basic Science Research Program through the National Research Foundation of Korea Grant (NRF-2013R1A1A2063744). S.H. Phark acknowledges the support from IBS-R009-D1.

Publisher Copyright:
© 2015, Nature Publishing Group. All rights reserved.

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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.",

author = "Minji Gwon and Ahrum Sohn and Yunae Cho and Phark, {Soo Hyon} and Jieun Ko and {Sang Kim}, Youn and Kim, {Dong Wook}",

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AU - Gwon, Minji

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AU - Cho, Yunae

AU - Phark, Soo Hyon

AU - Ko, Jieun

AU - Sang Kim, Youn

AU - Kim, Dong Wook

N1 - Funding Information: This work was supported by New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant (20123010010160) and Basic Science Research Program through the National Research Foundation of Korea Grant (NRF-2013R1A1A2063744). S.H. Phark acknowledges the support from IBS-R009-D1. Publisher Copyright: © 2015, Nature Publishing Group. All rights reserved.

PY - 2015/11/16

Y1 - 2015/11/16

N2 - 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.

AB - 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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Plasmon-Enhanced Surface Photovoltage of ZnO/Ag Nanogratings

Abstract

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