Design of fiber metamaterials with negative refractive index in the infrared

Metamaterials possess intricate, sub-wavelength microstructures, making scalability a salient concern in regard to their practicality. Fiber-drawing offers a route to producing large quantities of material at relatively low cost, though to our knowledge, a fiber-based design capable of negative refractive index behaviour has not yet been proposed. We submit that the electric and magnetic dipole resonance modes of the fiber can be enhanced by including in the fiber aligned metallic inclusions. Addition of a solid metallic core can effect a synchronisation of these modes, allowing a collection of the fibers to possess negative refractive index.