Nonreciprocal optical response in parity-breaking superconductors

Superconductivity, an emergence of a macroscopic quantum state, gives rise to unique electromagnetic responses leading perfect shielding magnetic field and zero electrical resistance. In this paper, we propose that superconductors with the space-inversion symmetry breaking host giant nonreciprocal optical phenomena, such as photocurrent generation second harmonic generation. The show divergent behaviors in low-frequency regime originate from two-fold indicators parity-breaking superconductors, namely, superfluid density Berry curvature derivative. Furthermore, mechanism frequency dependence are closely tied preserved temporal superconductor. relation is useful for probing space-time structure superconducting symmetry. characterize property hence quantify performance optics.