Super-Planckian emission cannot really be ‘thermal’

Super-Planckian emission cannot really be ‘thermal’
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DOI:
10.1038/s41566-022-01005-y
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发表时间:
2022-05
期刊:
影响因子:
35
通讯作者:
Yuzhe Xiao;M. Sheldon;M. Kats
Yuzhe Xiao;M. Sheldon;M. Kats
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Yuzhe Xiao;M. Sheldon;M. Kats

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热动力发射器有时会超过普朗克热发射极限。我们澄清了这种超普朗克发射是可能的,认为远场超普朗克发射需要的能量分布是不符合一个独特的温度,因此该过程不应该被称为“热发射”。
A heat-powered emitter can sometimes exceed the Planck thermal-emission limit. We clarify when such super-Planckian emission is possible, arguing that far-field super-Planckian emission requires a distribution of energy that is not consistent with a unique temperature, and therefore the process should not be called ‘thermal emission’.