  We show that a thin superconductor slab illuminated by a desired pattern of
light behaves as a completely controllable two-dimensional photonic media that
could be applied in a wide range of optical devices. In this case, the
permittivity spatial variation, which is fundamentally required in many
photonic devices, is achieved by means of selective variation of cooper-pair
density under patterned irradiation. The process of photo-effect in
superconductors is the proposed mechanism for deformation of spatial
distribution of cooper pair density and consequently non-uniform permittivity.
In this perspective, the effects of non-uniform photon irradiation on the
density of paired carriers and two-dimensional position dependent permittivity
are investigated. Applying these results, the optical properties of several
illumination patterns leading to the formation of different types of optical
devices are studied. As we will show, in contrast to previous superconductor
photonic crystals, the proposed structure has promising advantages such as
possibility of implementing tunable heterostructures, optical gratings, and
permittivity gradients with significant simplicity.
