Article published in Physical Review Letters on ‘Tunable Photon Statistics Exploiting the Fano Effect in a Waveguide’
A strong optical nonlinearity arises when coherent light is scattered by a semiconductor quantum dotcoupled to a nanophotonic waveguide. We exploit the Fano effect in such a waveguide to control the phaseof the quantum interference underpinning the nonlinearity, experimentally demonstrating a tunablequantum optical filter which converts a coherent input state into either a bunched or an antibunchednonclassical output state. We show theoretically that the generation of nonclassical light is predicated onthe formation of a two-photon bound state due to the interaction of the input coherent state with thequantum dot. Our model demonstrates that the tunable photon statistics arise from the dependence of thesign of two-photon interference (either constructive or destructive) on the detuning of the input relative tothe Fano resonance.