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Title: Conformal TCO-semiconductor-metal nanowire array for narrowband and polarization-insensitive hot-electron photodetection application
Authors: Zhang, Cheng
Wu, Kai
Ling, Bo
Li, Xiaofeng
Keywords: DRNTU::Engineering::Electrical and electronic engineering::Microelectronics
Hot Electrons
Issue Date: 2016
Source: Zhang, C., Wu, K., Ling, B., & Li, X. (2016). Conformal TCO-semiconductor-metal nanowire array for narrowband and polarization-insensitive hot-electron photodetection application. Journal of Photonics for Energy, 6(4), 042502-. doi:10.1117/1.JPE.6.042502
Series/Report no.: Journal of Photonics for Energy
Abstract: The use of hot electrons arising from the nonradiative decay of surface plasmons (SPs) is increasingly attracting interests in photodetection, photovoltaics, photocatalysis, and surface imaging. Nevertheless, the quantum efficiency of the hot-electron devices has to be improved to promote the practical applications. We propose an architecture of conformal TCO/semiconductor/metal nanowire (NW) array for hot-electron photodetection with a tunable optical response across the visible and near-infrared bands. The wavelength, strength, and bandwidth of the plasmonic resonance are tailored by controlling the lattice periodicity and topology. Finite-element simulation demonstrates that the near-perfect, polarization-insensitive, and ultranarrow-band optical absorption can be achieved in the conformal NW system. By the excitation of localized SPs, a strong field concentrates at the top corner of the NWs with a high hot-electrons generation rate. The analytical probability-based electrical calculation further shows that the SPs-enhanced photoresponsivity can be more than five times larger than that of the flat reference.
DOI: 10.1117/1.JPE.6.042502
Schools: School of Electrical and Electronic Engineering 
Rights: © 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). This paper was published in Journal of Photonics for Energy and is made available as an electronic reprint (preprint) with permission of SPIE. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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