Analytical Determination of Plasmon Resonances in MIM Nanocavities

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• 作者：Ling Guo ; Zhijun Sun
• 关键词：Surface plasmons ; Reflection ; Resonance ; Metal ; insulator ; metal
• 刊名：Plasmonics
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：10
• 期：6
• 页码：1625-1629
• 全文大小：760 KB
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• 作者单位：Ling Guo (1)
  Zhijun Sun (1)
  
  1. Department of Physics, Xiamen University, Xiamen, 361005, 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

Optical interactions in many metallic nanostructures involve plasmon resonances in the basic elements of metal-insulator-metal (MIM) nanocavities. Though the resonances can be theoretically studied with numerical simulations, an analytical approach is highly needed for its advantage in physical analysis and target-oriented design of structures. But it is often obstructed by the difficulty in calculation of reflection coefficients of the surface plasmon (SP) waves at terminals of the MIM nanocavities. Here, we use the permittivity of real metals, instead of perfect electric conductors, to have a discussion on the study of this issue by R. Gordon [PRB, 73, 153405, 2006], to clarify the applicability of this method to calculate SP reflection coefficients. Further, based on the Fabry-Perot cavity model, plasmon resonances in metallic nanoslit and nanogroove cavities are studied and compared with results obtained from rigorous numerical simulations. Keywords Surface plasmons Reflection Resonance Metal-insulator-metal