Near-Unity Coupling Efficiency of a Quantum Emitter to a Photonic Crystal Waveguide
Near-Unity Coupling Efficiency of a Quantum Emitter to a Photonic Crystal Waveguide
A quantum emitter efficiently coupled to a nanophotonic waveguide constitutes a promising system for the realization of single-photon transistors, quantum-logic gates based on giant single-photon nonlinearities, and high bit-rate deterministic single-photon sources. The key figure of merit for such devices is the $\beta$-factor, which is the probability for an emitted …