We calculate the near-field radiative heat transfer (NFRHT) between two charged metallic plates with an external electric field oriented perpendicular to the plates. The near-field radiative heat flux is discussed in detail for gold, silver, and copper plates. The results show that the NFRHT between the copper plates is the largest. Due to the coupling between electrostatic interactions and surface fluctuations, the p-wave heat flux is amplified by several orders of magnitude by the perpendicular electric field. With increasing electric-field strength, the heat flux between the copper plates increases rapidly to a maximum value. Moreover, for a separation between the copper plates of 10–20 nm, the magnitude of the perpendicular electric field corresponding to the maximal heat flux increases exponentially with plate separation. We study how to use the external electric field to control the NFRHT between metal plates, which has a wide range of applications in thermal nano-devices.

我们计算了两个带电金属板之间的近场辐射传热 (NFRHT)，外部电场垂直于板取向。详细讨论了金、银和铜板的近场辐射热通量。结果表明，铜板之间的NFRHT最大。由于静电相互作用和表面波动之间的耦合，p-波热通量被垂直电场放大了几个数量级。随着电场强度的增加，铜板之间的热通量迅速增加到最大值。此外，对于 10-20 nm 的铜板之间的分离，对应于最大热通量的垂直电场的大小随板分离呈指数增加。我们研究了如何利用外部电场来控制金属板之间的 NFRHT，这在热纳米器件中具有广泛的应用。