Exciton-polariton parametric scattering in quasi-one-dimensional system

Exciton-polaritons, hybrid particles composed of photons and excitons, have been identified as a potential solution for the control of light at the nanoscale. This is due to their unique combination of the controllability of excitons and the fast propagation velocity of photons, which enables Bose-Einstein condensation to occur at room temperature. Excitonpolaritons have also been shown to be capable of generating entangled states through parametric scattering, an important aspect for quantum communication and detection. However, conventional resonant pump techniques for generating entangled exciton-polaritons have limitations. In this work, it reports a successful demonstration of inter-band parametric scattering of exciton-polaritons in quasi-one-dimensional ZnO system through the use of an improved angle-resolved fluorescence spectroscopy system. This observation holds significant implications for the study and application of exciton-polaritons in the field of quantum communication and quantum technology.