Exciton‐polaritons in ZnO microcavity resonators

We report on the observation of exciton‐polaritons in all‐oxide resonator structures with a quasi‐bulk ZnO film as active medium at temperatures between 10 K and room temperature. The observed energy splitting of the exciton‐polariton branches of about 76 meV in maximum reflects the resonator to be in the strong coupling regime.