论文标题
在元表面堆叠结构中通过相相一致性升级的血浆吸收水平
Plasma absorption levelling by phase coherence in meta-surface stacked structure
论文作者
论文摘要
在本文中，我们提出了一个MIM（金属跨表面 - 金属）堆叠结构，以实现中和远红外带宽的完美吸收。大量金属复合金属单元放置在均匀的绝缘体GE层上，该单元沉积在均匀的金属Ti表面上。每个单元都由四个正方形中部的四个右角三角形立方体组成。三个共振吸收峰可能是离散的或取决于立方体厚度的水平。一旦金属立方体比其皮肤深度薄，有效的超宽带吸收器便可以实现，平均吸收量超过8-14μm。我们构建了一个四级的腔 - 偶极相互作用模型，以解释血浆吸收水平的现象。这是由元表面强的相干性产生的，因为三种混合模式与在金属层之间的微型腔阵列中共同的腔体光子耦合。该结构对红外光是极化选择性的。它在红外检测和成像方面具有巨大的潜力。
In this paper, we propose a MIM (metallic metasurface-insulator-metal) stacked structure to realize perfect absorption in mid- and far- infrared bandwidth. A large number of metallic composite metallic units placed on a uniform layer of insulator Ge which is deposited on a uniform metallic Ti surface. Each of units consists of four right-angled triangular cubes in middle of four sides of a square. Three resonant absorption peaks can be discrete or levelling dependent to thickness of cubes. Once metallic cubes are thinner than its skin depth, an effective ultra-broadband absorber is realizable with average absorption over 90% percent ranging from 8-14μm. We build a four-level cavity-dipole interacting model to explain phenomena of plasma absorption levelling. This is created by strong phase coherence from meta-surface since three hybrid modes are coupled by common cavity photons in arrays of micro-cavities between top and below metallic layers. The structure is polarization-selective to infrared light. It has great potential in infrared detection and imaging.
