Surface-mode-assisted amplification of radiative heat transfer between nanoparticles
Surface-mode-assisted amplification of radiative heat transfer between nanoparticles
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DOI：
10.1103/physrevb.97.165437
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发表时间：
2018-02
影响因子：
3.7
通讯作者：
R. Messina;Svend‐Age Biehs;P. Ben-Abdallah
中科院分区：
文献类型：
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作者：
R. Messina;Svend‐Age Biehs;P. Ben-Abdallah
我们表明，两个纳米粒子之间的辐射热通量可以显着放大时，它们被放置在附近的平面基板支持表面共振。在介电纳米颗粒的情况下，放大因子超过两个数量级，而在金属纳米颗粒的情况下，放大因子较低。我们分析了这种效果如何取决于频率和粒子表面的距离，通过清楚地识别产生放大的表面模式的签名。最后，我们展示了在基底顶部存在石墨烯片如何通过在金属纳米颗粒的情况下也可以放大两个数量级来修改效果。这种长程放大效应在纳米粒子网络的热弛豫动力学中起着重要的作用。
We show that the radiative heat flux between two nanoparticles can be significantly amplified when they are placed in proximity of a planar substrate supporting a surface resonance. The amplification factor goes beyond two orders of magnitude in the case of dielectric nanoparticles, whereas it is lower in the case of metallic nanoparticles. We analyze how this effect depends on the frequency and on the particles-surface distance, by clearly identifying the signature of the surface mode producing the amplification. Finally, we show how the presence of a graphene sheet on top of the substrate can modify the effect, by making an amplification of two orders of magnitude possible also in the case of metallic nanoparticles. This long range amplification effect should play an important role in the thermal relaxation dynamics of nanoparticle networks.