原子尺度下两固体间由声学振动模式驱动的辐射热交换
Radiative heat exchange driven by acoustic vibration modes between two solids at the atomic scale
AI总结：
本文研究了原子尺度下声学振动模式对极性材料非局域辐射响应的显著贡献，通过分子动力学模拟与涨落电动力学理论揭示了光机械耦合在两平板近场辐射传热及低温环境中的主导作用，为原子尺度的热流控制与冷却策略开发开辟了新途径。
摘要：
当两固体间的真空间隙厚度小于声学声子的波长时，后者可通过 van der Waals 力或静电相互作用隧穿该间隙。在此，我们证明在原子尺度下，这些机械振动模式也能对极性材料的非局域辐射响应产生显著贡献。通过结合分子动力学模拟与涨落电动力学理论，我们研究了由这种光机械耦合引起的两平板间的近场辐射传热，并揭示了其在低温环境下的主导作用。这些结果为原子尺度下热流的控制与冷却策略的开发开辟了令人振奋的途径。
英文摘要：
When two solids are separated by a vacuum gap of thickness smaller than the wavelength of acoustic phonons, the latter can tunnel across the gap thanks to van der Waals forces or electrostatic interactions. Here we show that these mechanical vibration modes can also contribute significantly, at the atomic scale, to the nonlocal radiative response of polar materials. By combining molecular-dynamics simulations with fluctuational-electrodynamics theory, we investigate the near-field radiative heat transfer between two slabs due to this optomechanical coupling and highlight its dominant role at cryogenic temperatures. These results pave the way to exciting avenues for the control of heat flux and the development of cooling strategies at the atomic scale.
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