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Title: Experimental demonstration of a bilayer thermal cloak
Authors: Han, T.
Bai, X.
Gao, D.
Thong, J.T.L. 
Li, B. 
Qiu, C.-W. 
Issue Date: 3-Feb-2014
Citation: Han, T., Bai, X., Gao, D., Thong, J.T.L., Li, B., Qiu, C.-W. (2014-02-03). Experimental demonstration of a bilayer thermal cloak. Physical Review Letters 112 (5) : -. ScholarBank@NUS Repository.
Abstract: Invisibility has attracted intensive research in various communities, e.g., optics, electromagnetics, acoustics, thermodynamics, dc, etc. However, many experimental demonstrations have only been achieved by virtue of simplified approaches due to the inhomogeneous and extreme parameters imposed by the transformation-optic method, and usually require a challenging realization with metamaterials. In this Letter, we demonstrate a bilayer thermal cloak made of bulk isotropic materials, and it has been validated as an exact cloak. We experimentally verified its ability to maintain the heat front and its heat protection capabilities in a 2D proof-of-concept experiment. The robustness of this scheme is validated in both 2D (including oblique heat front incidence) and 3D configurations. The proposed scheme may open a new avenue to control the diffusive heat flow in ways inconceivable with phonons, and also inspire new alternatives to the functionalities promised by transformation optics. © 2014 American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.112.054302
Appears in Collections:Staff Publications

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