Scale Law of Far-Field Thermal Radiation from Plasmonic Metasurfaces.,Physical Review Letters

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Scale Law of Far-Field Thermal Radiation from Plasmonic Metasurfaces.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-04-03 , DOI: 10.1103/physrevlett.124.137401
Jiayu Li ₁ , Bowen Yu ₁ , Sheng Shen ₁

Affiliation

Although metamaterials or metasurfaces consisting of patterned subwavelength structures have been widely employed for thermal emission control, the collective behavior of the emitter array in a metasurface still remains unclear. Here, based on the quasinormal mode theory, we derive a new scale law to elucidate the far-field thermal emission from a metasurface composed of densely packed plasmonic nanoemitters. The tight binding method is used to approximate the collective resonant mode of the emitter array. Because of in-phase near-field interaction, the thermal radiation from a single emitter in a metasurface is suppressed by its adjacent emitters. We find that the overall far-field thermal radiation from a metasurface can be either positively or negatively correlated with the packing density of the emitters, depending on the mode properties of the single emitter. This new scale law thus serves as a general guideline for designing metasurfaces with desired thermal emission properties.

中文翻译：

等离子体后表面远场热辐射的尺度定律。

尽管由图案化的亚波长结构组成的超材料或超表面已被广泛用于热发射控制，但超表面中发射器阵列的集体行为仍然不清楚。在这里，基于准正规模理论，我们得出了一个新的尺度定律，以阐明由密集堆积的等离激元纳米发射体组成的超表面的远场热发射。紧密结合方法用于近似发射器阵列的集体共振模式。由于同相近场相互作用，超表面中单个发射器的热辐射被相邻的发射器抑制了。我们发现，来自超颖表面的整体远场热辐射可以与辐射源的堆积密度正相关或负相关，取决于单个发射器的模式属性。因此，这一新的比例定律可作为设计具有所需散热特性的超颖表面的一般指南。

更新日期：2020-03-31

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