中国物理B ›› 2009, Vol. 18 ›› Issue (11): 4870-4874.doi: 10.1088/1674-1056/18/11/042

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Analysis of waveguide structure for surface plasmon polariton interference

梁慧敏1, 方亮2, 王景全3, 李敏3, 牛晓云3, 杜惊雷3   

  1. (1)College of Science, Hebei University of Engineering, Hebei 056038, China; (2)Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China; (3)Physics Department, Sichuan University, Chengdu 610064, China
  • 收稿日期:2009-01-10 修回日期:2009-03-17 出版日期:2009-11-20 发布日期:2009-11-20
  • 基金资助:
    Project supported by the National Basic Research of China (Grant No 2006CD302902), the National Natural Science Foundation of China (Grant Nos 60676024 and 60878031) and the Specialized Research Fund of China for the Doctoral Program of Higher Education (Grant No 20060610006).

Analysis of waveguide structure for surface plasmon polariton interference

Wang Jing-Quan(王景全)a),Liang Hui-Min(梁慧敏)b),Fang Liang(方亮)c), Li Min(李敏)a),Niu Xiao-Yun(牛晓云)a), and Du Jing-Lei(杜惊雷)a)†   

  1. a Physics Department, Sichuan University, Chengdu 610064, China; b College of Science, Hebei University of Engineering, Hebei 056038, China; c Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
  • Received:2009-01-10 Revised:2009-03-17 Online:2009-11-20 Published:2009-11-20
  • Supported by:
    Project supported by the National Basic Research of China (Grant No 2006CD302902), the National Natural Science Foundation of China (Grant Nos 60676024 and 60878031) and the Specialized Research Fund of China for the Doctoral Program of Higher Education (Grant No 20060610006).

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摘要： This paper describes a multi-reflected mode based on a narrow waveguide to enlarge the interferential area of surface plasmon polaritons (SPPs). A reasonable thickness of metal film is coated under the waveguide, the incident angle and the waveguide thickness are optimized in order to effectively increase interferential area. This is a key point for research into the Goos--H\"anchen shift to optimize the waveguide thickness. Finally, the SPP interferential field is simulated with the finite-difference time-domain (FDTD) technique to prove the optimized results, and indicates that not only is the interferential area enlarged, but the high contrast is also maintained. Furthermore, the mode can fabricate some specific interferential patterns by adding some modulating techniques to the waveguide. So the mode has potential application in the fabrication of sub-wavelength patterns.

Abstract: This paper describes a multi-reflected mode based on a narrow waveguide to enlarge the interferential area of surface plasmon polaritons (SPPs). A reasonable thickness of metal film is coated under the waveguide, the incident angle and the waveguide thickness are optimized in order to effectively increase interferential area. This is a key point for research into the Goos--Hänchen shift to optimize the waveguide thickness. Finally, the SPP interferential field is simulated with the finite-difference time-domain (FDTD) technique to prove the optimized results, and indicates that not only is the interferential area enlarged, but the high contrast is also maintained. Furthermore, the mode can fabricate some specific interferential patterns by adding some modulating techniques to the waveguide. So the mode has potential application in the fabrication of sub-wavelength patterns.

Key words: surface plasmon polaritons (SPPs), sub-wavelength interferential lithography, waveguide, Goos--Hänchen shift

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
42.79.Gn (Optical waveguides and couplers)