Non-Reciprocal Polarization Actuated Plasmonic Convertible Circulator-Delay Line

Novel non-reciprocal devices are highly desirable for the advancement of quantum technology in nanoscale. We demonstrate the polarization controlled non-reciprocal nature of a plasmonic two-wire transmission-line (TWTL). Theoretically we investigate the chiral charge and current densities as well as energy transport through the propagation of Surface Plasmon Polaritons (SPPs). Based on the non-reciprocity we experimentally realize the polarization actuated dual functioning convertible circulator/fixed interval delay line which also offers a wide optical bandwidth.