发表机构
Tokyo University of Agriculture and Technology; University of Birmingham; RIKEN Center for Advanced Photonics; RIKEN Cluster for Pioneering Research; Gakushuin University; Tokushima University（东京农工大学; 伯明翰大学; 理化学研究所先进光子研究中心; 理化学研究所先锋研究集群; 学习院大学; 德岛大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用红外热成像直接观察超表面吸收体的电磁吸收热提取，通过对比铜板冷却速度证明超表面介导的热传递机制，为非平衡热过程提供新见解。
AI 中文摘要
超表面热吸收通常通过平衡条件下的远场红外光谱进行表征。该方法提供表面发射率信息，但并未直接揭示电磁吸收所传递的热量。然而，要理解由此产生的温度变化，必须考虑相关的热传递。在此，我们利用红外热成像直接观察电磁吸收所提取的热量。通过监测与集成超表面的热电装置接触的铜板的冷却动态，我们表明该铜板比置于非结构化平面（对照）上的铜板冷却得更快。这一结果直接证明了热量从相邻固体传递至超表面，揭示了一种由超表面介导的电磁吸收热传递机制。这些发现为超表面吸收体实现的非平衡热过程提供了新的见解。
英文摘要
Metasurface heat absorption is conventionally characterized by far-field infra-red spectroscopy under equilibrium conditions. The approach provides information on the surface emissivity but does not directly reveal heat transferred by electromagnetic absorption. To understand the resulting temperature change, however, the associated heat transfer must be considered. Here, we directly observe heat extracted by electromagnetic absorption using infrared thermography. By monitoring the cooling dynamics of a copper plate placed in contact with a metasurface-integrated thermoelectric device, we show that the copper plate cools faster than one placed on an unstructured planar surface (control). This result provides direct evidence of heat transfer from the adjacent solid to the metasurface; revealing a metasurface-mediated electromagnetic absorption heat transfer mechanism. These findings provide new insight into nonequilibrium thermal processes enabled by metasurface absorbers.
Comments9 pages, 6 figures
