Time-frequency encoded single-photon generation and broadband single-photon storage with a tunable subradiant state

An atomic system that can be addressed via a single optical mode, hereafter called one-dimensional atom, is central for many applications in quantum technologies. A cavity with large Purcell factor required to collect the emission efficiently, but small long-time memory storage. Here, we introduce an effective and versatile atom consisting of two interacting emitters efficiently coupled mode factor. The dipole–dipole interaction gives rise subradiant state tunable bandwidth. We demonstrate generation time-shaped photons implementation memory. discuss experimental challenges practical using different systems.