High Surface Phonon-Polariton in-Plane Thermal Conductance along Coupled Films
High Surface Phonon-Polariton in-Plane Thermal Conductance along Coupled Films
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DOI：
10.3390/nano10071383
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发表时间：
2020-07-01
期刊：
影响因子：
5.3
通讯作者：
Nomura, Masahiro
中科院分区：
文献类型：
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作者：
Tachikawa, Saeko;Ordonez-Miranda, Jose;Nomura, Masahiro
表面声子极化激元（SPhP）是一种倏逝电磁波，其传播距离比声子和电子的平均自由程长几个数量级。因此，它们有望成为强大的热载体，能够显着提高极性纳米结构的面内热导率。在这项工作中，我们表明，SiO2/Si（10 μ m厚）/SiO2层状结构有效地提高了SPhP的热传输，使其面内热导率是10倍高于相应的一个单一的SiO（2）膜，由于SPhPs传播的耦合沿着其极性SiO2纳米层。因此，所获得的结果表明，所提出的三层结构可以优于单一悬浮膜的面内热性能，同时显着提高其机械稳定性。
Surface phonon-polaritons (SPhPs) are evanescent electromagnetic waves that can propagate distances orders of magnitude longer than the typical mean free paths of phonons and electrons. Therefore, they are expected to be powerful heat carriers capable of significantly enhancing the in-plane thermal conductance of polar nanostructures. In this work, we show that a SiO2/Si (10 mu m thick)/SiO2 layered structure efficiently enhances the SPhP heat transport, such that its in-plane thermal conductance is ten times higher than the corresponding one of a single SiO(2)film, due to the coupling of SPhPs propagating along both of its polar SiO2 nanolayers. The obtained results thus show that the proposed three-layer structure can outperform the in-plane thermal performance of a single suspended film while improving significantly its mechanical stability.