Experimental demonstration of an ultra-thin three-dimensional thermal cloak

Abstract

We report the first experimental realization of a three-dimensional thermal cloak shielding an air bubble in a bulk metal without disturbing external thermal flux. The cloak is made of a thin layer of homogeneous and isotropic material with specially designed three-dimensional manufacturing. The thickness of cloak is 100 um while the cloaked air bubble has a diameter of 1 cm, achieving the ratio between dimensions of the cloak and the cloaked object two orders smaller than previous thermal cloaks which were mainly realized in a two-dimensional geometry. This work can find applications in novel thermal devices in the three-dimensional physical space.

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Cited by in corpus (6)

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• Analogies between optical propagation and heat diffusion: Applications to micro-cavities, gratings and cloaks
• Optimization Method in 2D Thermal Cloaking Problems
• Spectral efficiency of engineered thermal cloaks in the frequency regime