Chiral Interactions of Light in Complex Potentials

Abstract

We propose a new type of chiral optical interactions based on a low-dimensional polarization eigenstate. Directional coupling between different spin momentum of light will be discussed, which leads to the convergence of polarization states to the singularity point. For its meta-material implementation, we use parity-time (PT) symmetric potentials in a polar meta-molecule platform, to achieve the unidirectional energy transfer in polarization space. Two different forms of low-dimensional eigenstate implementation, each in evanescent and propagating wave regime will be discussed, which are determined by the relative magnitude of plasma and characteristic frequency. Our results pave a path to the molding of optical spin, following the singularly-existed eigenstate.