Invisibility cloaks can make objects invisible not just to light in the visible part of the spectrum, but to many other physical excitations. These include acoustic waves, matter waves, heat flux, and infrared or ultraviolet electromagnetic (EM) waves. But so far, any single invisibility cloak can manipulate only one of these types of excitations.
Now in a new study, scientists have provided the first experimental demonstration of an invisibility cloak that can simultaneously manipulate two physical excitations: electric current and heat flux. The cloak is made of silicon and other materials, which opens up a range of new applications such as on-chip devices that involve both current and heat, as well as high-performance solar cells.
via PhysOrg
November 25, 2014
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