arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0903.3565physics.opticscond-mat.mtrl-sciphysics.pop-ph
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超材料亚波长光学的基本机制:电荷振荡诱导的光发射和干涉

Fundamental mechanism underlying subwavelength optics of metamaterials: Charge oscillation-induced light emission and interference

X. R. Huang, R. W. Peng, Mu Wang

摘要:

光和导电纳米结构之间的相互作用可以导致各种新颖和迷人的现象。这些性质可能有广泛的应用,但其潜在的机制尚未完全理解。通过计算导电光栅上的表面电荷密度波,并将其与经典的表面等离子体激元进行比较,我们揭示了一个关于光与结构化导电表面上的自由电子振荡耦合的一般而具体的图像,该图像可以导致振荡的亚波长电荷图案(即,欺骗表面等离子体,但没有经典表面等离子体的色散特性)。从这些光源发出的新的小波然后相消干涉以形成倏逝波。该原理通常与其他机制(例如共振)相结合,主要是一种几何效应,可以普遍涉及包含自由电子的所有周期性和非周期性结构(包括完美导体)的光散射。欺骗表面等离子体激元图像可以为开发基于超材料的纳米光学器件提供明确的指导。

英文摘要:

Interactions between light and conducting nanostructures can result in a variety of novel and fascinating phenomena. These properties may have wide applications, but their underlying mechanisms have not been completely understood. From calculations of surface charge density waves on conducting gratings and by comparing them with classical surface plasmons, we revealed a general yet concrete picture about coupling of light to free electron oscillation on structured conducting surfaces that can lead to oscillating subwavelength charge patterns (i.e., spoof surface plasmons but without the dispersion property of classical surface plasmons). New wavelets emitted from these light sources then destructively interfere to form evanescent waves. This principle, usually combined with other mechanisms (e.g. resonance), is mainly a geometrical effect that can be universally involved in light scattering from all periodic and nonperiodic structures containing free electrons, including perfect conductors. The spoof surface plasmon picture may provide clear guidelines for developing metamaterial-based nano-optical devices.

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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