‘Sawfish’ Photonic Crystal Cavity for Near‐Unity Emitter‐to‐Fiber Interfacing in Quantum Network Applications (Advanced Optical Materials 13/2024)

Emitter‐to‐Fiber Interface Transfers Spin‐photon interfaces are the core of quantum communication networks. The cover depicts such an interface: a single solid‐state quantum emitter is embedded in a ‘Sawfish’ photonic crystal cavity. Its cavity‐enhanced red fluorescence light is coupled to a waveguide by adiabatically decreasing the cavity corrugation amplitude. This provides near‐unity efficiency in interfacing the emitter's spin with photons. The cavity's web‐like texture resembles the grid employed in finite element method simulations to investigate the coupled cavity‐waveguide system. For further details, see article number 2301286 by Julian M. Bopp, Tim Schröder, and co‐workers.