【作者】 王超楠； 白明； 祁云平；

【Author】 Chaonan Wang,Ming Bai,Yunping Qi Electromagnetic Laboratory,School of Electronic information engineering,Beihang University

【机构】 北京航空航天大学电子信息工程学院电磁工程实验室；

【摘要】 介电常数是描述材料电磁特性的重要参数。当入射波打在亚波长金属单缝上,波在入射端口和出射端口之间来回震荡,该过程可以等效为一个法布里帕罗谐振腔。其透射谱可以用修正后的法布里帕罗谐振公式精确描述,透射特性也可以用法布里帕罗谐振特性进行解释。而狭缝的法布里帕罗谐振效率对狭缝中填充的介质材料十分敏感。因此,我们可以利用该特性,通过测量谐振峰的位置来测量狭缝中填充介质的介电常数,从而确定介质成分,为纳米传感器的制作提供了一种可借鉴的方法。更多还原

【Abstract】 Dielectric constant is an important parameter to describe the electromagnetic properties of materials.When the plane wave impinges on a sub-wavelength single slit,it goes back and forth between the incident end and the outgoing end,which can be modeled as a Fabry-Pérot-like cavity.The transmission can be expressed by a simple Fabry-Pérot equivalent formula and all the details of the observed transmission spectra can be explained with the characteristics of the Fabry-Pérot resonance.And the efficiency of the F-P resonance is quite sensitive to the dielectric material filled in the slit.Therefore,permittivity of the dielectric in the slit can be obtained by measuring the positions of these resonant peaks,thus to determine the ingredient of the dielectric,which provides a new reference method for nano-metric sensors..更多还原