Nonreciprocal thermal metamaterials:Methods and applications  

作　　者：Zhengjiao Xu Chuanbao Liu Xueqian Wang Yongliang Li Yang Bai 

机构地区：[1]Institute for Advanced Material and Technology,University of Science and Technology Beijing,Beijing 100083,China [2]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第7期1678-1693,共16页矿物冶金与材料学报（英文版）

基　　金：the National Natural Science Foundation of China(No.52325208);the Fundamental Research Funds for the Central Universities(No.06500174);National Key Research and Development Program of China(No.2022YFB3807401)。

摘　　要：Nonreciprocity of thermal metamaterials has significant application prospects in isolation protection,unidirectional transmission,and energy harvesting.However,due to the inherent isotropic diffusion law of heat flow,it is extremely difficult to achieve nonreciprocity of heat transfer.This review presents the recent developments in thermal nonreciprocity and explores the fundamental theories,which underpin the design of nonreciprocal thermal metamaterials,i.e.,the Onsager reciprocity theorem.Next,three methods for achieving nonreciprocal metamaterials in the thermal field are elucidated,namely,nonlinearity,spatiotemporal modulation,and angular momentum bias,and the applications of nonreciprocal thermal metamaterials are outlined.We also discuss nonreciprocal thermal radiation.Moreover,the potential applications of nonreciprocity to other Laplacian physical fields are discussed.Finally,the prospects for advancing nonreciprocal thermal metamaterials are highlighted,including developments in device design and manufacturing techniques and machine learning-assisted material design.

关 键 词：thermal metamaterials NONRECIPROCITY NONLINEARITY spatiotemporal modulation 

分 类 号：TB34[一般工业技术—材料科学与工程]