what are invisibility cloaks made of
But metamaterials can affect the magnetic component too, expanding the range of interactions that are possible. The metamaterials used in attempts to make invisibility cloaks are made up of a lattice with the spacing between elements less than the wavelength of the light we wish to âbendâ. The silk-based cloak recently announced uses'split-ring resonators' â concentric pairs of rings with splits at opposite ends. 10,000 gold resonators were initially attached to a one-centimetre-square piece of silk.