论文标题
基于石墨烯的近场辐射热转化的增强
Graphene-based enhancement of near-field radiative-heat-transfer rectification
论文作者
论文摘要
我们根据两种由极性和金属 - 绝缘体转换材料制成的底物之间的近场相互作用提出了一个热装置。由于光学特性的温度依赖性，该设备充当热整流器，在反转两个温度时，暗示热通量中的强烈不对称性。通过用石墨烯片覆盖两个底物，我们显示了整流系数的显着增强。通过研究通量光谱及其距离依赖性，我们证明，由于存在石墨烯片的存在，这种增强与热通量相对于静电状态的分离距离的幂律依赖性的变化有关。我们的结果突出了基于石墨烯的混合结构在纳米级热管理领域的有前途的作用。
We present a thermal device based on the near-field interaction between two substrates made of a polar and a metal-insulator-transition material. As a result of the temperature dependence of the optical properties, this device acts as a thermal rectifier, implying a strong asymmetry in the heat flux when reversing the two temperatures. By covering both substrates with a graphene sheet we show a significant enhancement of rectification coefficient. By investigating the flux spectral properties along with its distance dependence, we prove that this enhancement is associated to a change in the power-law dependence of heat flux with respect to the separation distance in the electrostatic regime due to the presence of graphene sheets. Our results highlight the promising role of graphene-based hybrid structures in the domain of nanoscale thermal management.
