Refractive index in generalized superconductors with Born–Infeld electrodynamics

We investigate, in the probe limit, the negative refraction in the generalized superconductors with the Born–Infeld electrodynamics. We observe that the system has a negative Depine–Lakhtakia index in the superconducting phase at small frequencies and the greater the Born–Infeld corrections the larger the range of frequencies or the range of temperatures for which the negative refraction occurs. Furthermore, we find that the tunable Born–Infeld parameter can be used to improve the propagation of light in the holographic setup. Our analysis indicates that the Born–Infeld electrodynamics plays an important role in determining the optical properties of the boundary theory.