  We demonstrate tuning of a metamaterial device that incorporates a form of
spatial gradient control. Electrical tuning of the metamaterial is achieved
through a vanadium dioxide layer which interacts with an array of split ring
resonators. We achieved a spatial gradient in the magnitude of permittivity,
writeable using a single transient electrical pulse. This induced gradient in
our device is observed on spatial sc ales on the order of one wavelength at 1
THz. Thus, we show the viability of elements for use in future devices with
potential applications in beamforming and communications
