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arXiv physics/0606207physics.opticsphysics.comp-ph
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多孔薄膜中表面声子极化激元介导的巨传输和耗散

Giant transmission and dissipation in perforated films mediated by surface phonon polaritons

D. Korobkin, Y. A. Urzhumov, B. Neuner, G. Shvets, Z. Zhang, I. D. Mayergoyz

摘要:

我们从实验和理论上研究了亚波长孔阵列对碳化硅(SiC)光学薄膜电磁特性的影响。使用傅里叶变换红外(FTIR)显微镜发现的巨大的吸收和传输,并通过引入一个依赖于频率的有效介电常数$ε_{\rm eff}(ω)$的穿孔膜解释。$ε_{\rm eff}(ω)$的值由两种不同类型的空穴共振的激发决定:离域慢表面极化激元(SSP),其频率主要由阵列周期决定;以及局域表面极化激元(LSP),其对应于孤立空穴的共振。只有SSP显示修改$ε_{\rm eff}(ω)$强烈到足以引起巨大的传输和吸收。

英文摘要:

We experimentally and theoretically study electromagnetic properties of optically thin silicon carbide (SiC) membranes perforated by an array of sub-wavelength holes. Giant absorption and transmission is found using Fourier Transformed Infrared (FTIR) microscopy and explained by introducing a frequency-dependent effective permittivity $ε_{\rm eff}(ω)$ of the perforated film. The value of $ε_{\rm eff}(ω)$ is determined by the excitation of two distinct types of hole resonances: a delocalized slow surface polariton (SSP) whose frequency is largely determined by the array period, and a localized surface polariton (LSP) which corresponds to the resonances of an isolated hole. Only SSPs are shown to modify $ε_{\rm eff}(ω)$ strongly enough to cause giant transmission and absorption.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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