近场辐射换热的Fano干涉剪裁
Fano interference for tailoring near-field radiative heat transfer
摘要：
我们表明，法诺共振的存在下，近场辐射传热，这使得在特定波长的光谱热通量的强烈抑制和增强。这是通过利用等离子体声子耦合在一个对称的纳米腔由极化激元材料涂有金属层，其中腔的每一侧保持在不同的温度。多层结构所维持的等离子体和声子模式的强杂交是由它们的偏振匹配决定的。这导致了热带隙的打开，其中对于所有波矢量和对于各个成分是热透射的波长，耦合系统中的热传递被抑制。
英文摘要：
We show the existence of Fano resonances in the context of near-field radiative heat transfer, which enable the strong suppression and enhancement of the spectral heat flux at specific wavelengths. This is demonstrated by making use of the plasmon-phonon coupling in a symmetric nano cavity composed by a polaritonic material coated with a metallic layer, in which each side of the cavity is kept at different temperatures. The strong hybridization of the plasmonic and phononic modes sustained by the multilayer structure is determined by the matching of their polarization. This leads to the opening of a thermal band gap, where heat transfer in the coupled system is inhibited for all wave vectors and for wavelengths at which the individual constituents are thermally transmissive.
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