论文标题
双层石墨烯中近场传热的等离子调节
Plasmonic Tuning of the Near Field Heat Transfer in Double Layer Graphene
论文作者
论文摘要
我们讨论了非平衡双层石墨烯系统中的非辐射热传递。我们表明，在中性点，热交换由层间等离子体模式主导，并得出热电流作为温度和层间分离的函数的分析表达式。这些结果表明，对于一系列低温，这两个石墨烯层比传统金属更有效。这种现象背后的物理原因是存在具有较大能量的带间激发，而石墨烯光谱中的动量很小。传热的等离子机理被静电掺杂彻底抑制。这可以通过两层之间的小施加电压来调整热量交换。
We discuss the non-radiative heat transfer in non-equilibrium double layer graphene system. We show that at the neutrality point the heat exchange is dominated by the inter-layer plasmon modes and derive analytic expressions for the heat current as a function of temperature and the interlayer separation. These results show that for a range of low temperatures the two graphene layers are much more efficient heat exchanger than conventional metals. The physical reason behind this phenomenon is the presence of inter-band excitations with a large energy, and a small momentum in graphene spectrum. Plasmonic mechanism of the heat transfer is sharply suppressed by electrostatic doping. This allows for tuning of the heat exchange by a small applied voltage between the two layers.
