We demonstrate that homogeneous naturally-occurring materials can form hyperbolic media, and can be used for nonmagnetic negative refractive index systems. We present specific realizations of the proposed approach for the THz and far-IR frequencies. The proposed structures operate away from resonance, thereby promising the capacity for low-loss devices. © 2012 Leonid V. Alekseyev et al.
Alekseyev, L. V., Podolskiy, V. A., & Narimanov, E. E. (2012). Homogeneous hyperbolic systems for terahertz and far-infrared frequencies. Advances in OptoElectronics, 2012. https://doi.org/10.1155/2012/267564