Mechanically tunable interlaced wire medium

The double interlaced wire metamaterial consists of two identical three-dimensional networks inserted into one another and shifted by half of the period. In this work we propose deforming the metamaterial composed of cubic networks by stretching/compression along the main diagonal axis. We study the influence of the proposed deformation on the dispersion properties of the low-frequency mode: a spheroidal shape of isofrequency surfaces is predicted analytically and observed numerically, a longitudinal polarization of the mode is demonstrated.