两近距离固体间的传导-辐射耦合
Conduction-radiation coupling between two closely-separated solids
摘要：
在由Polder和van Hove引入的两个紧密间隔的物体之间的辐射热交换理论中，假设材料内部的热载体与穿过分离间隙的光子之间没有相互作用。在这里，我们释放这个约束，通过开发一个通用的理论来描述的任意大小的两个固体之间的传导-辐射耦合的亚波长分离间隙。我们表明，由于与传导耦合引起的温度分布，在纳米距离的两个平行板之间交换的辐射热通量可以比传统理论预测的小几个数量级。这些结果可能在纳米热管理，近场固态冷却和纳米能量转换领域具有重要意义。
英文摘要：
In the theory of radiative heat exchanges between two closely-spaced bodies introduced by Polder and van Hove, no interplay between the heat carriers inside the materials and the photons crossing the separation gap is assumed. Here we release this constraint by developing a general theory to describe the conduction-radiation coupling between two solids of arbitrary size separated by a subwavelength separation gap. We show that, as a result of the temperature profile induced by the coupling with conduction, the radiative heat flux exchanged between two parallel slabs at nanometric distances can be several orders of magnitude smaller than the one predicted by the conventional theory. These results could have important implications in the fields of nanoscale thermal management, near-field solid-state cooling and nanoscale energy conversion.
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