Exploring the Limits of Super-Planckian Far-Field Radiative Heat Transfer Using 2D Materials,ACS Photonics

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Exploring the Limits of Super-Planckian Far-Field Radiative Heat Transfer Using 2D Materials
ACS Photonics ( IF 6.5 ) Pub Date : 2018-06-19 00:00:00 , DOI: 10.1021/acsphotonics.8b00328
Víctor Fernández-Hurtado _{1,

2} , Antonio I. Fernández-Domínguez ₁ , Johannes Feist ₁ , Francisco J. García-Vidal _{1,

3} , Juan Carlos Cuevas _{1,

2}

Affiliation

Very recently it has been predicted that the far-field radiative heat transfer between two macroscopic systems can largely overcome the limit set by Planck’s law if one of their dimensions becomes much smaller than the thermal wavelength (λ_Th ≈ 10 μm at room temperature). To explore the ultimate limit of the far-field violation of Planck’s law, here we present a theoretical study of the radiative heat transfer between two-dimensional (2D) materials. We show that the far-field thermal radiation exchanged by two coplanar systems with a one-atom-thick geometrical cross section can be more than 7 orders of magnitude larger than the theoretical limit set by Planck’s law for blackbodies and can be comparable to the heat transfer of two parallel sheets at the same distance. In particular, we illustrate this phenomenon with different materials such as graphene, where the radiation can also be tuned by a external gate, and single-layer black phosphorus. In both cases the far-field radiative heat transfer is dominated by TE-polarized guiding modes, and surface plasmons play no role. Our predictions provide a new insight into the thermal radiation exchange mechanisms between 2D materials.

中文翻译：

探索使用二维材料的超普朗克远场辐射传热的极限

就在最近曾有人预言两个宏观系统之间的远场辐射传热可以在很大程度上克服普朗克定律的极限集，如果他们的尺寸之一比热波长小得多（λ_钍在室温下约为≈10μm）。为了探索远距离违反普朗克定律的极限，这里我们对二维（2D）材料之间的辐射热传递进行理论研究。我们表明，具有一个原子厚度的几何横截面的两个共面系统交换的远场热辐射可以比普朗克定律为黑体所设定的理论极限大7个数量级以上，并且可以与热量相媲美。以相同的距离转印两张平行的纸。特别是，我们用石墨烯之类的不同材料来说明这种现象，在这种材料中，辐射也可以通过外部门和单层黑磷来调节。在这两种情况下，远场辐射传热均受TE极化引导模式的支配，而表面等离子体激元则不起任何作用。

更新日期：2018-06-19

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