论文标题
近极偏光型结构之间的近场辐射传热
Near-field radiative heat transfer between hybrid polaritonic structures
论文作者
论文摘要
当利用极化材料时，近距离物体之间的近场辐射传热可能会超过远场黑体辐射。已经做出了巨大的努力，以实验测量这种基本的随机效应，但主要基于简单的材料。在这项工作中，我们培养了一种全光学方法，以表征较少探索的等离子 - phonon混合层状系统由石墨烯 - SIC异质结构制成的。在150 nm真空间隙上获得了大约26次黑体辐射极限的大热通量，这归因于三种不同的表面模式的耦合（等离子体，声子极性和沮丧的模式）。还探索了混合系统中极极模式的相互作用，以构建具有几乎统一热通量可调性的可切换的热倍频设备。这项工作为理解模式介导的近场传热铺平了道路，并为为各种应用提供了一个平台，以构建热粒子或热呼式电源块。
Near-field radiative heat transfer between close objects may exceed the far-field blackbody radiation in orders of magnitude when exploiting polaritonic materials. Great efforts have been made to experimentally measure this fundamental stochastic effect but mostly based on simple materials. In this work, we foster an all-optical method to characterize the heat transfer between less explored plasmon-phonon hybrid polaritonic systems made of graphene-SiC heterostructures. A large heat flux about 26 times of the blackbody radiation limit is obtained over a 150-nm vacuum gap, attributed to the couplings of three different surface modes (plasmon, phonon polaritons and frustrated mode). The interaction of polaritonic modes in the hybrid system is also explored to build a switchable thermophotonic device with nearly unity heat flux tunability. This work paves the way for understanding mode-mediated near-field heat transfer and provides a platform for building thermophotonic or thermo-optoelectronic blocks for various applications.
