Controlling Diffraction of Surface Plasmon Polaritons in Nanoscale Metal Waveguide Arrays

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• 作者：Qian Wang ; Wenrui Hu ; Jingwei Wei ; Weihua Lin
• 关键词：Surface plasmon polaritons ; Diffraction ; Nanoscale metal waveguide arrays
• 刊名：Plasmonics
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：11
• 期：1
• 页码：117-124
• 全文大小：1,390 KB
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• 作者单位：Qian Wang (1)
  Wenrui Hu (1)
  Jingwei Wei (1)
  Weihua Lin (1)
  
  1. Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan, 430072, 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

In the paper, we investigate the feasibility of restraining the diffraction of propagating surface plasmon polaritons in nanoscale metal waveguide arrays (MWGAs). Based on the dispersion relation of MWGAs, two methods, tailoring the input end interface of the MWGAs and the surrounding medium and augmenting the wave vector of exciting light by auxiliary MWGAs, are proposed to excite the non-diffraction mode of MWGAs. All theoretical predictions are well demonstrated by the finite-difference time-domain numerical simulations. Keywords Surface plasmon polaritons Diffraction Nanoscale metal waveguide arrays