Surface Plasmon-Enhanced Nano-photodetector for Green Light Detection

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• 作者：Lin-Bao Luo ; Kun Zheng ; Cai-Wang Ge ; Yi-Feng Zou ; Rui Lu ; Yuan Wang…
• 关键词：II ; VI group semiconductors ; Surface plasmon ; Electron injection ; Photoresponsivity ; FEM
• 刊名：Plasmonics
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：11
• 期：2
• 页码：619-625
• 全文大小：3,668 KB
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• 作者单位：Lin-Bao Luo (1)
  Kun Zheng (1)
  Cai-Wang Ge (1)
  Yi-Feng Zou (1)
  Rui Lu (1)
  Yuan Wang (1)
  Dan-Dan Wang (1)
  Teng-Fei Zhang (1)
  Feng-Xia Liang (2)
  
  1. School of Electronic Sciences and Applied Physics, Hefei University of Technology, Hefei, Anhui, 230009, People’s Republic of China
  2. School of Materials Science and Engineering and Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, Anhui, 230009, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Biotechnology
  Nanotechnology
  Biophysics and Biomedical Physics
  Biochemistry
  
• 出版者：Springer US
• ISSN：1557-1963

文摘

Light manipulation is vitally important for one-dimensional semiconductor nanostructure-based photodetectors which have great potential in future optoelectronic circuits, imaging technique, and light-wave communication. In this paper, we reported a plasmonic gold nanoparticle (AuNP)-decorated nano-photodetector for green light sensing. It is found that the as-fabricated device exhibits obvious increase in light absorption in the range from 400 to 550 nm, after functionalization of plasmonic AuNPs. Further device performance analysis reveals that the photocurrent of the plasmonic photodetector was increased by more than sevenfold, compared with that without coating. What is more, both responsivity and detectivity are found to increase as well. According to theoretical simulation based on the finite element method (FEM), the observed enhancement in device performance can be attributed to the surface plasmon-induced direct electron injection from the metal nanoparticles to the semiconductor nanostructures.