Fig. 1: Chiral perfect reflections in superconductors.
From: Circular-polarization-selective perfect reflection from chiral superconductors
a Kerr-rotating perfect reflection (KPR). Both circular polarizations are 100 % reflected but with different phase shifts. b Circular-polarization-selective perfect reflection (CSPR). Only one of the two circular polarizations is reflected 100 %. c, d Frequency windows for chiral perfect reflections. Chiral perfect reflections require photon energy below the fermionic excitation gap Eg. KPR occurs for optical frequencies below the lower chiral plasmon energy ℏωp,lower, and CSPR occurs between ℏωp,lower and \(\min ({E}_{g},\hslash {\omega }_{p,{{\rm{higher}}}})\).
