Metal-dielectric photonic structures with extreme directionality: A concept of wide-aperture omnidirectional isolator

Photonic structures involving metallic nanolayers can display extreme directionality. Here we further show that magnetophotonic structure involving metallic nanolayers can behave as a wide-aperture omnidirectional isolator. It transmits light in a single (forward) direction, while the light incident from the opposite side is reflected back to space regardless of polarization and direction of incidence.