Controllable three-dimensional thermal invisibility cloak based on multilayer two-dimensional topological materials

Abstract

The invention provides a controllable three-dimensional thermal invisibility cloak based on multilayer two-dimensional topological materials. The controllable three-dimensional thermal invisibility cloak is realized by a surface covering shell layer composed of the two-dimensional topological materials, wherein the surface covering shell layer is composed of multiple two-dimensional topological material ring layers which are stacked up from bottom to top, and by controlling the crystallization degree of the two-dimensional topological materials in the different ring layers, each layer can correspond to a different thermal conductivity coefficient, so that the three-dimensional thermal conductivity distribution required by thermal invisibility is obtained; moreover, the thermal field can be restored to the original distribution after heat flow bypasses a cloak area, and the thermal invisibility function can be realized. Meanwhile, by circularly controlling the crystallization-reverse crystallization process of the two-dimensional topological materials in each ring layer, the real-time switching on / off performance of the thermal invisibility cloak is realized, thereby overcoming the disadvantage that a thermal invisibility cloak cannot be switched on / off circularly.

Description

technical field [0001] The invention relates to a method and device for realizing an adjustable three-dimensional thermal invisibility cloak based on multi-layer two-dimensional topological materials, which can be applied to the field of heat flow control. Background technique [0002] In 2006, Document 1: "J.B.Pendry et al, SCIENCE, 2006(312): 1780" proposed for the first time that the use of anisotropic media can manipulate the propagation direction of light waves and realize the concept of optical cloaking, which has attracted widespread attention and has become an important field in the field of optics. research hotspots. At the same time, as an expanded field of optical cloak application, that is to manipulate the direction of heat flow through artificial structures to achieve thermal cloaking has quickly become a hot issue in the field of thermodynamics. In 2013, document 2: "R. Schittny et al, Phys. Rev. Lett. 2013(110): 195901" used copper and polydimethylsiloxane t...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the shortcomings of existing thermal stealth cloaks that are mostly based on two-dimensional plane structures, and the thermal stealth function of thermal stealth cloaks does not have tunability (that is, the thermal stealth function cannot be turned on / off), and utilize two Dimensional topological materials, a common material, provide a new technology to realize an adjustable (open / close) three-dimensional thermal invisibility cloak, which enables the system to have simple structure, fast speed, easy operation, low energy consumption, strong real-time performance and low implementation cost. inferior merit

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