Chiral Nanophotonics with Atomically Thin Semiconductors

Spin-valley polarization in atomically thin semiconductors opens a new perspective to explore optical chirality. Here we summarize our progress on the exploitation of 2D semiconductors as sources and probes for chiral nano-optics. We show how competing optical transitions in few-layer materials allow a high degree of circular polarization. Second, in order to enhance polarization, we design achiral nanophotonic resonators that satisfy the conditions needed for improving chiral light emission as a path towards efficient sources of spin-valley-polarized light.