Various embodiments of the present invention are directed to metamaterial-based devices and to methods of fabricating metamaterial-based devices. In one embodiment, a metamaterial-based device comprises a channel layer, a top metallic layer, and a bottom metallic layer. The channel layer has a top and a bottom surfaces, and at least one channel configured to transmit at least one material. The top metallic layer has a top surface and a bottom surface attached to the top surface of the channel layer and has a first lattice of openings extending between the top and bottom surfaces of the top metallic layer. The bottom metallic layer has a top surface and a bottom surface, wherein the top surface of the bottom metallic layer is attached to the bottom surface of the channel layer.