US Patent 8207907 Variable metamaterial apparatus

An apparatus for interacting with electromagnetic radiation includes a plurality of elements each having a respective individual response. The plurality of elements is arranged in a pattern corresponding to a selected group response to the electromagnetic radiation. The selected group response is a function of variable inter-element couplings between selected ones of the elements and one or more other ones of the elements. The variable inter-element couplings are variable in response to an external input.