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.
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.
出处
《吉首大学学报（自然科学版）》
CAS
2011年第5期59-61,共3页
Journal of Jishou University(Natural Sciences Edition)
基金
"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)
关键词
光波导
色散方程
有效折射率
灵敏度
optical waveguides
the dispersion equation
effective refractive index
sensitvity
