Reconfigurable gradient index using VO2 memory metamaterials
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 scales 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. © 2011 American Institute of Physics.
Goldflam, MD; Driscoll, T; Chapler, B; Khatib, O; Marie Jokerst, N; Palit, S; Smith, DR; Kim, BJ; Seo, G; Kim, HT; Ventra, MD; Basov, DN
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