A tunable two-dimensional thermal invisibility cloak based on multilayer graphene ring layers

Abstract

The invention provides an adjustable and controllable two-dimensional thermal invisibility cloak based on multiple annular graphene layers. The adjustable and controllable two-dimensional thermal invisibility cloak is formed in the manner that with the center of the x-y horizontal plane as the axis, prolongation of annular graphene layers is conducted layer by layer in the x-axis direction and the y-axis direction. All the layers can correspond to different thermal conductivity coefficients through control over the Fermi level distribution of graphene in the different annular layers, and then two-dimensional thermal conductivity distribution needed by thermal invisibility is obtained; then, after thermal flow winds around the cloak area, a temperature field recovers original distribution, and therefore the thermal invisibility function is achieved; and an object at the center of the thermal invisibility cloak is sheltered from external thermal flow disturbance, and external thermal flow distribution is not influenced. The real-time switching on / off performance of the thermal invisibility cloak is achieved through circular control over the Fermi level distribution of the each annular graphene layer, and therefore the defect that the two-dimensional thermal invisibility cloak cannot be circularly switched on or off is overcome.

Description

technical field

[0001] The invention relates to a method and device for realizing an adjustable two-dimensional thermal invisibility cloak based on multilayer graphene ring layers, 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 to make a two-dimensi...

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