journal6 ›› 2011, Vol. 32 ›› Issue (5): 59-61.

• 物理与电子 • 上一篇    下一篇

基于双面金属包覆介质波导灵敏度的研究

  

  1. (铜仁学院物理与电子科学系,贵州 铜仁 554300)
  • 出版日期:2011-09-25 发布日期:2012-04-06
  • 作者简介:冉茂武(1971-),贵州沿河人,铜仁学院物理与电子科学系副教授,主要从事生物传感器和光波导设备及其参数测量研究.
  • 基金资助:

    “区域光纤通信网与新型光通信系统”国家重点实验室基金资助项目(2011GZKF031107);贵州省教育厅自然科学青年基金资助项目(2008098);铜仁学院教改资金资助项目(院教改2008)

Study on the Sensitivity of Symmetrical  Metal-Cladding Dielectric Waveguide

  1. (Department of Physics and Electronic Science,Tongren University,Tongren,554300,Guizhou China)
  • Online:2011-09-25 Published:2012-04-06

摘要:利用双面金属包覆介质波导色散方程,通过微扰近似,当波导层为亚毫米量级时有N→0的特性,得到超高阶导模与偏振无关.定义了灵敏度,得到了灵敏度与有效折射率、厚度、波长和介电常数的关系,当有效折射率趋于零时,超高阶导模具有极高的灵敏度.该理论在制备生物传感器、光电子器件中具有指导意义.

关键词: 光波导, 色散方程, 有效折射率, 灵敏度

Abstract: By applying the perturbation approximation method to dispersion equation of symmetrical metal-Cladding dielectric medium waveguide,the author finds that when the thickness of waveguide layer decreases to sub millimeter range,the effective index will approach  zero,and the ultrahigh-order modes are no longer related to polarization.Then the author defines  the sensitivity of waveguide,and gets its relationship with effective index,thickness,wavelength and dielectric constant.When the effective index approaches zero,the ultrahigh-order modes will have a super high sensitivity.This theory is of certain directive significance to biosensor and photoelectronic device.

Key words: optical waveguides;the dispersion equation;effective refractive index, sensitvity

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