Figure 1
From: Directional subradiance from helical-phase-imprinted multiphoton states
Schematic helical-phase-imprinted multiphoton state preparation. (a) A multiphoton source carrying orbital angular momentum (OAM) is absorbed by the atoms on a single ring, where two excitations (dash circles) are shown here for demonstration and as one possibility out of the complete excitation space. The atomic system is then prepared into one of multiphoton super- or subradiant states, depending on OAM lħ; of light. The scattered light property out of these multiphoton states depends on the ring geometry of radius r and ϕ. Other atomic configurations of (b) concentric or (c) stacked rings can be the candidates for creation of helical-phase-imprinted multiphoton states.
