Tailoring near-field thermal radiation between metallo-dielectric multilayers using coupled surface plasmon polaritons.
Tailoring near-field thermal radiation between metallo-dielectric multilayers using coupled surface plasmon polaritons.
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DOI：
10.1038/s41467-018-06795-w
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发表时间：
2018-10-16
影响因子：
16.6
通讯作者：
Lee BJ
中科院分区：
文献类型：
--
作者：
Lim M;Song J;Lee SS;Lee BJ
几个实验表明，当两个物体被纳米级的间隙分开时，热辐射会大大增强，超过黑体极限。虽然这些测量只证明了均匀材料之间的辐射增强，但理论研究现在集中在通过调整纳米材料中支持的表面极化激元来控制近场辐射。在这里，我们通过实验证明了近场热辐射金属介电多层膜之间的纳米间隙。由于在多个金属-电介质界面处支撑的表面等离子体激元（SPP）的耦合，实现了传热的显著增强。这使得在160 nm真空间隙处的金属-电介质多层膜具有与仅相隔75 nm的半无限金属表面之间相同的传热速率。我们还表明，近场热辐射可以很容易地调整通过修改耦合SPP的谐振条件。该研究为利用平面结构间表面极化激元介导的近场热辐射提供了一个新的方向。在这里，作者报告的实验演示的近场热辐射增强金属介电多层膜之间的亚微米间隙距离和近场热辐射可以很容易地调整通过修改耦合表面等离子体激元的共振条件。
Several experiments have shown a huge enhancement in thermal radiation over the blackbody limit when two objects are separated by nanoscale gaps. Although those measurements only demonstrated enhanced radiation between homogeneous materials, theoretical studies now focus on controlling the near-field radiation by tuning surface polaritons supported in nanomaterials. Here, we experimentally demonstrate near-field thermal radiation between metallo-dielectric multilayers at nanoscale gaps. Significant enhancement in heat transfer is achieved due to the coupling of surface plasmon polaritons (SPPs) supported at multiple metal-dielectric interfaces. This enables the metallo-dielectric multilayers at a 160-nm vacuum gap to have the same heat transfer rate as that between semi-infinite metal surfaces separated by only 75 nm. We also demonstrate that near-field thermal radiation can be readily tuned by modifying the resonance condition of coupled SPPs. This study will provide a new direction for exploiting surface-polariton-mediated near-field thermal radiation between planar structures. Here, the authors report on an experimental demonstration of near-field thermal radiation enhancement between metallo-dielectric multilayers separated by submicron gap distances and that near-field thermal radiation can be readily tuned by modifying the resonance condition of coupled surface plasmon polaritons.
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