Figure 1
From: Manipulating Steady Heat Conduction by Sensu-shaped Thermal Metamaterials

(a) Schematic of a random cluster of sensu-shaped thermal metamaterial units made of two regular bulk materials. The inset schematically shows the transformation principle of thermal metamaterial unit. (b) Two heat-sources placed near the inner boundary of a thermal metamaterial unit, analogous to the performance of an optical hyperlens. (c) A heat-source placed near the outer boundary of a thermal metamaterial unit, demonstrating harvesting property.