Experimental validation of the suppression of spatial dispersion in artificial plasma

An isotropic plasma is composed of free charge carriers. Wire medium is an artificial plasma that is constructed by aligning conducive wires in one-, two-, or three dimensions (see e.g. [1]). In the simplest form, that is the one-dimensional case, the wires are aligned in parallel with a certain lattice constant. In more complicated two- and three-dimensional wire media the wires are aligned in a similar way in parallel in two or three orthogonal directions, respectively. Unlike in the gas-like plasma, the electromagnetic properties of this artificial plasma are constrained by its geometrical structure. Such constrains are, for instance, anisotropy and spatial dispersion.