Lang S, Sharma G, Molesky S, Kränzien P U, Jalas T, Jacob Z, Petrov A Yu, Eich M
Institute of Optical and Electronic Materials, Hamburg University of Technology, Eissendorfer Strasse 38, 21073, Hamburg, Germany.
University of Alberta, Department of Electrical and Computer Engineering, 9107 - 116 Street, Edmonton, T6G 2V4, Canada.
Sci Rep. 2017 Oct 24;7(1):13916. doi: 10.1038/s41598-017-14242-x.
Super-Planckian near-field radiative heat transfer allows effective heat transfer between a hot and a cold body to increase beyond the limits long known for black bodies. Until present, experimental techniques to measure the radiative heat flow relied on steady-state systems. Here, we present a dynamic measurement approach based on the transient plane source technique, which extracts thermal properties from a temperature transient caused by a step input power function. Using this versatile method, that requires only single sided contact, we measure enhanced radiative conduction up to 16 times higher than the blackbody limit on centimeter sized glass samples without any specialized sample preparation or nanofabrication.
超普朗克近场辐射热传递能够使热体与冷体之间的有效热传递增加，超越黑体长期以来已知的极限。到目前为止，测量辐射热流的实验技术依赖于稳态系统。在此，我们提出一种基于瞬态平面热源技术的动态测量方法，该方法从阶跃输入功率函数引起的温度瞬变中提取热特性。使用这种仅需单面接触的通用方法，我们在无需任何特殊样品制备或纳米加工的情况下，在厘米尺寸的玻璃样品上测量到增强的辐射传导，其比黑体极限高出16倍。
