期刊
APPLIED PHYSICS LETTERS
卷 99, 期 13, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3625937
关键词
finite difference time-domain analysis; gallium arsenide; metal-semiconductor-metal structures; nanostructured materials; photoconductivity; photodetectors; plasmonics; surface plasmons
We report the experimental characterization of high-responsivity plasmonics-based GaAs metal-semiconductor-metal photodetector (MSM-PD) employing metal nano-gratings. Both the geometry and light absorption near the designed wavelength are theoretically and experimentally investigated. The measured photocurrent enhancement is 4-times in comparison with a conventional single-slit MSM-PD. We observe reduction in the responsivity as the bias voltage increases and the input light polarization varies. Our experimental results demonstrate the feasibility of developing a high-responsivity, low bias-voltage high-speed MSM-PD. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3625937]
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