Highly Efficient Excitation of Surface Plasmon Polaritons Under Asymmetric Dielectric Surroundings

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• 作者：Yan Guo ; Jianjun Yang ; Kuanbiao Li
• 关键词：Surface plasmon polaritons ; Excitation efficiency ; Diffraction ; Plasmon density of state
• 刊名：Plasmonics
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：11
• 期：1
• 页码：11-15
• 全文大小：2,712 KB
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• 作者单位：Yan Guo (1)
  Jianjun Yang (2)
  Kuanbiao Li (3)
  
  1. College of Life Information Science and Instrument Engineering, Hangzhou Dianzi University, 310018, Zhejiang, China
  2. Key Laboratory of Optical Information Science and Technology, Education Ministry of China, Institute of Modern Optics, Nankai University, Tianjin, 300071, China
  3. HANGZHOU HANGYANG Co. Ltd, Hangzhou, 310014, Zhejiang, 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

We demonstrate a single deep subwavelength slit for efficiently improving the excitation of surface plasmon polaritons (SPP) on metals through raising the dielectric permittivity of the output surrounding medium and numerically investigating their physical properties. Via adjusting the slit width and the output permittivity, either SPP launching intensity or its efficiency can be enhanced by almost 25 times and 170 %, respectively, compared with that under the symmetric surroundings. The underlying mechanisms are attributed to the spatial distribution change of the transmitted field and the plasmon density of state (DOS). Keywords Surface plasmon polaritons Excitation efficiency Diffraction Plasmon density of state