Experimental investigation of omnidirectional multiphysics bilayer invisibility cloak with anisotropic geometry  

作　　者：丰火雷 张兴伟 周利敏 张悦凯 倪玉山 Huolei Feng;Xingwei Zhang;Limin Zhou;Yuekai Zhang;Yushan Ni(Department of Aeronautics and Astronautics,Fudan University,Shanghai 200433,China;Key Laboratory of Advanced Ship Materials and Mechanics,College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]Department of Aeronautics and Astronautics,Fudan University,Shanghai 200433,China [2]Key Laboratory of Advanced Ship Materials and Mechanics,College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China

出　　处：《Chinese Physics B》2024年第3期649-658,共10页中国物理B（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant No.11572090);the Fundamental Research Funds for the Central Universities(Grant No.3072022GIP0202).

摘　　要：Thermal-electric bilayer invisibility cloak can prevent the heat flux and electric current from touching the object without distorting the external temperature and electric potential fields simultaneously.In this paper,we design an omnidirectional thermal-electric invisibility cloak with anisotropic geometry.Based on the theory of neutral inclusion,the anisotropic effective thermal and electric conductivities of confocal elliptical bilayer core-shell structure are derived,thus obtaining the anisotropic matrix material to eliminate the external disturbances omnidirectionally.The inner shell of the cloak is selected as an insulating material to shield the heat flux and electric current.Then,the omnidirectional thermal-electric cloaking effect is verified numerically and experimentally based on the theoretical anisotropic matrix and manufactured composite structure,respectively.Furthermore,we achieve the thermal-electric cloaking effect under a specific direction of heat flux and electric current using the isotropic natural materials to broaden the selection range of materials.The method proposed to eliminate anisotropy and achieve the omnidirectional effect could also be expanded to other different physical fields for the metadevices with different functions.

关 键 词：omni-directionality MULTIPHYSICS bilayer confocal ellipse invisibility cloak 

分 类 号：O469[理学—凝聚态物理]