负折射率材料对隐失波的幅度增益

Imaging analysis of negative refraction materials to evanescent wave

分析了隐失波透过负折射率材料制成的透镜时,可以实现相位的调整,从而实现波的聚焦的原理;另外利用叠加原理(干涉法)及场量匹配法分析了负折射率材料如何实现对隐失波的振幅的放大,得到负折射率材料对隐失波有幅度增益,行波和隐失波都能聚焦成像的结论;并利用传输线理论提出隐失波透过负折射率材料平板时可等效地形成一个LC振荡电路,从而实现对隐失波的幅度增益.

The difference between the evanescent wave penetrating the lens made by the negative refractive material and the lens made by the refractive medium is analyzed. It realizes the phase adjustment, thus realizes wave focusing. Moreover, that the negative refraction material also amplifies evanescent wave oscillation amplitude is analyzed by using the principle of superposition （interference method） and the field quantity match law. The gain of negative refractive index medium for evanescent wave is obtained. The traveling wave and the evanescent wave all could focus the image formation. And it proposes that the evanescent wave penetrates the negative refractive material slab is equivalent to forming a LC oscillating circuit in the transmission line theory, and realizes the amplitude gain to the evanescent wave.