Zipped data and code set for our paper "Creation and detection of optical spin in a

[Abstract]We demonstrate that non-chiral nanoparticles can produce chiral light when off-center point emitters are coupled to their surface plasmon modes (SPMs). Chiral emission arises from asymmetrical plasmon mode propagation from the source combined with the spin-momentum locked nature of the SPMs. The Purcell effect ensures that radiation from the coupled mode dominates over that from the emitter itself, giving rise to electromagnetic radiation with a circularly polarized component -- i.e. chiral light. We experimentally demonstrate this effect by exciting cathode luminescence from a gold nanorod and coupling it to a nanofiber probe which also supports spin-momentum locked light. This converts the net spin of the emission into a net directionality of propagation in the fiber modes.