中国物理B ›› 2009, Vol. 18 ›› Issue (6): 2529-2534.doi: 10.1088/1674-1056/18/6/068

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Propagation properties of a modified surface plasmonic waveguide with an arc slot

薛文瑞, 郭亚楠, 张文梅   

  1. College of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, China
  • 收稿日期:2008-10-31 修回日期:2008-12-11 出版日期:2009-06-20 发布日期:2009-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60771052) and the Natural Science Foundation of Shanxi Province, China (Grant No 2006011029).

Propagation properties of a modified surface plasmonic waveguide with an arc slot

Xue Wen-Rui(薛文瑞)†, Guo Ya-Nan(郭亚楠), and Zhang Wen-Mei(张文梅)   

  1. College of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, China
  • Received:2008-10-31 Revised:2008-12-11 Online:2009-06-20 Published:2009-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60771052) and the Natural Science Foundation of Shanxi Province, China (Grant No 2006011029).

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摘要： We introduce a modified surface plasmonic waveguide with an arc slot. The dependences of distribution of energy flux density, effective index, propagation length and mode area of the symmetric mode supported by this waveguide on geometrical parameters and working wavelength are analysed by using the finite-difference frequency-domain (FDFD) method. Results show that the energy flux density distributes mainly in four corners which are formed by two arcs, and the closer to the corners it is, the stronger the energy flux density will be. The effective index, the propagation length and the mode area are influenced by geometrical parameters, including the width, the thickness and the arc radius of the surface plasmonic waveguide, as well as the working wavelength. It has been shown that the surface plasmonic waveguide with an arc slot has better propagation properties than the surface plasmonic waveguide with a straight slot. This work may be helpful for applying the slot surface plasmonic waveguide to integrated photonics.

Abstract: We introduce a modified surface plasmonic waveguide with an arc slot. The dependences of distribution of energy flux density, effective index, propagation length and mode area of the symmetric mode supported by this waveguide on geometrical parameters and working wavelength are analysed by using the finite-difference frequency-domain (FDFD) method. Results show that the energy flux density distributes mainly in four corners which are formed by two arcs, and the closer to the corners it is, the stronger the energy flux density will be. The effective index, the propagation length and the mode area are influenced by geometrical parameters, including the width, the thickness and the arc radius of the surface plasmonic waveguide, as well as the working wavelength. It has been shown that the surface plasmonic waveguide with an arc slot has better propagation properties than the surface plasmonic waveguide with a straight slot. This work may be helpful for applying the slot surface plasmonic waveguide to integrated photonics.

Key words: surface plasmons, optical waveguides

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

  • 73.20.Mf
02.70.Bf (Finite-difference methods) 42.79.Gn (Optical waveguides and couplers) 42.82.Et (Waveguides, couplers, and arrays)