Black-hole-inspired thermal trapping with graded heat-conduction metadevices  

作　　者：Liujun Xu Jinrong Liu Peng Jin Guoqiang Xu Jiaxin Li Xiaoping Ouyang Ying Li Cheng-Wei Qiu Jiping Huang 

机构地区：[1]Department of Physics,State Key Laboratory of Surface Physics,and Key Laboratory of Micro and Nano Photonic Structures(MOE),Fudan University,Shanghai 200438,China [2]Department of Electrical and Computer Engineering,National University of Singapore,Singapore 117583,Singapore [3]Graduate School of China Academy of Engineering Physics,Beijing100193,China [4]School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,China [5]Interdisciplinary Center for Quantum Information,State Key Laboratory of Modern Optical Instrumentation,ZJU-Hangzhou,Global Scientific and Technological Innovation Center,Zhejiang University,Hangzhou 310027,China [6]International Joint Innovation Center,Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang,The Electromagnetics Academy of Zhejiang University,Zhejiang University,Haining 314400,China

出　　处：《National Science Review》2023年第2期126-133,共8页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(11725521 and 12035004 to J.H.,92163123 to Y.L.);the Science and Technology Commission of Shanghai Municipality(20JC1414700 to J.H.);the Singapore Ministry of Education(A-8000107-01-00 to C.-W.Q)。

摘　　要：The curved space-time produced by black holes leads to the intriguing trapping effect.So far,metadevices have enabled analogous black holes to trap light or sound in laboratory spacetime.However,trapping heat in a conductive environment is still challenging because diffusive behaviors are directionless.Inspired by black holes,we construct graded heat-conduction metadevices to achieve thermal trapping,resorting to the imitated advection produced by graded thermal conductivities rather than the trivial solution of using insulation materials to confine thermal diffusion.We experimentally demonstrate thermal trapping for guiding hot spots to diffuse towards the center.Graded heat-conduction metadevices have advantages in energy-efficient thermal regulation because the imitated advection has a similar temperature field effect to the realistic advection that is usually driven by external energy sources.These results also provide an insight into correlating transformation thermotics with other disciplines,such as cosmology,for emerging heat control schemes.

关 键 词：thermal trapping graded metadevices imitated advection ference between wave 

分 类 号：TK124[动力工程及工程热物理—工程热物理]