Creation of Tunable Homogeneous Thermal Cloak with Constant Conductivity

TL;DR

This paper presents a novel approach to creating a tunable thermal cloak using only homogeneous, naturally occurring materials with finite conductivity, simplifying fabrication and enabling flexible thermal flow manipulation.

Contribution

It introduces a method for designing a tunable thermal cloak with homogeneous materials, avoiding complex metamaterials and enabling practical, flexible thermal cloaking.

Findings

Homogeneous thermal cloaks can be achieved with natural materials.

Incomplete cloaks can function perfectly in thermal applications.

Practical realization using common conductive materials is feasible.

Abstract

Invisible cloak has long captivated the popular conjecture and attracted intensive research in various communities of wave dynamics, e.g., optics, electromagnetics, acoustics, etc. However, their inhomogeneous and extreme parameters imposed by transformation-optic method will usually require challenging realization with metamaterials, resulting in narrow bandwidth, loss, polarization-dependence, etc. On the contrary, we demonstrate that tunable thermodynamic cloak can be achieved with homogeneous and finite conductivity only employing naturally available materials. The controlled localization of thermal distribution inside the coating layer has been presented, and it shows that an incomplete cloak can function perfectly. Practical realization of such homogeneous thermal cloak has been suggested by using two naturally occurring conductive materials, which provides an unprecedentedly plausible way to flexibly realize flexible thermal cloak and manipulate thermal flow.