Microplasma-Induced Deformation of an Anomalous Response Spectrum of Electromagnetic Waves Propagating along Periodically Perforated Metal Plates
Microplasma-Induced Deformation of an Anomalous Response Spectrum of Electromagnetic Waves Propagating along Periodically Perforated Metal Plates
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DOI：
10.1143/jjap.48.062004
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发表时间：
2009-06
影响因子：
1.5
通讯作者：
Dae-Sung Lee;O. Sakai;K. Tachibana
中科院分区：
文献类型：
--
作者：
Dae-Sung Lee;O. Sakai;K. Tachibana
具有二维孔阵列的金属板对电磁波表现出异常的响应，在这项研究中，在孔中产生微等离子体，使其性质动态变形，并诱导出新颖的频率相关介电常数。当存在微等离子体时，毫米波段的电磁波在等效波导截止频率附近出现反常透射衰减。相反，反射波在这样的频率附近显著增强，其中反射率在没有微等离子体产生的情况下最小。这些实验结果表明，通常被称为欺骗表面等离子体激元的共振现象，和介电常数的动态变化引起的孔内介质的谐振频率移动。
Metal plates with two-dimensional hole arrays showed unusual responses of electromagnetic waves, and in this study microplasmas were generated in the holes to deform their properties dynamically and to induce novel frequency-dependent permittivity. Transmitted electromagnetic waves in millimeter wavelength range exhibited attenuation of anomalous transmittance around cutoff frequency of equivalent waveguide when microplasmas were present. On the contrary, the reflected waves were significantly enhanced around such a frequency, where reflectance is at minimum in the case without microplasma generation. These experimental results indicated resonance phenomenon which is usually called spoof surface plasmons, and dynamic change of dielectric constant in the medium inside the holes induced by microplasmas shifts their resonance frequency.