Fabrication and characterization of well-aligned plasmonic nanopillars with ultrasmall separations

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• 作者：Guangyuan Si (1)
  Xiaoxiao Jiang (1)
  Jiangtao Lv (1)
  Qiongchan Gu (1)
  Fengwen Wang (1)
  
  1. College of Information Science and Engineering ; Northeastern University ; 110004 ; Shenyang ; China
  
• 关键词：Plasmonic ; Nanopillars ; Dense arrays
• 刊名：Nanoscale Research Letters
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：9
• 期：1
• 全文大小：782 KB
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• 刊物主题：Nanotechnology; Nanotechnology and Microengineering; Nanoscale Science and Technology; Nanochemistry; Molecular Medicine;
• 出版者：Springer US
• ISSN：1556-276X

文摘

We show the fabrication of well-aligned gold and silver nanopillars with various array parameters via interference lithography followed by ion beam milling and compare the etching rates of these two metallic materials. Silver is suitable for fabricating ultrafine arrays with ultrasmall separations due to high milling rates. The optical properties of the fabricated nanopillars are specifically characterized from both normal incidence and oblique incident angles. Tunable surface plasmon resonances are achieved with varying structural parameters. Strong coupling effects are enabled when the separation between adjacent nanopillars is dramatically reduced, leading to useful applications in sensing and waveguiding.