Metamaterials: A Metamaterial Emitter for Highly Efficient Radiative Cooling (Advanced Optical Materials 8/2015)

Anisotropic metamaterial emitters can serve a key role in highly efficient radiative cooling. Described by M. Gu and co-workers on page 1047, they are designed to selectively radiate within the atmospheric transparency window and minimize absorption of atmospheric radiation outside the window. Using these unique radiative properties, a device realized with these artificial emitters has the ability to cool down 12 °C below the ambient temperature.