Salihoglu H, Shi J, Li Z, Wang Z, Luo X, Bondarev I V, Biehs S-A, Shen S
Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
Mathematics & Physics Department, North Carolina Central University, Durham, North Carolina 27707, USA.
Phys Rev Lett. 2023 Aug 25;131(8):086901. doi: 10.1103/PhysRevLett.131.086901.
Using transdimensional plasmonic materials (TDPM) within the framework of fluctuational electrodynamics, we demonstrate nonlocality in dielectric response alters near-field heat transfer at gap sizes on the order of hundreds of nanometers. Our theoretical study reveals that, opposite to the local model prediction, propagating waves can transport energy through the TDPM. However, energy transport by polaritons at shorter separations is reduced due to the metallic response of TDPM stronger than that predicted by the local model. Our experiments conducted for a configuration with a silica sphere and a doped silicon plate coated with an ultrathin layer of platinum as the TDPM show good agreement with the nonlocal near-field radiation theory. Our experimental work in conjunction with the nonlocal theory has important implications in thermophotovoltaic energy conversion, thermal management applications with metal coatings, and quantum-optical structures.
在涨落电动力学框架内使用跨维度等离子体材料（TDPM），我们证明了在数百纳米量级的间隙尺寸下，介电响应中的非局域性会改变近场热传递。我们的理论研究表明，与局部模型预测相反，传播波可以通过TDPM传输能量。然而，由于TDPM的金属响应比局部模型预测的更强，在较短间距下极化子的能量传输会减少。我们针对以涂有超薄铂层的二氧化硅球体和掺杂硅板作为TDPM的配置进行的实验，与非局域近场辐射理论显示出良好的一致性。我们的实验工作与非局域理论相结合，在热光伏能量转换、金属涂层的热管理应用以及量子光学结构方面具有重要意义。
