Tailoring the confined states for exciton-polaritons in a one-dimensional ZnO microrod

摘要： The application of confinement potential is an efficient way to improve the optical properties of exciton polaritons. In this work, we report experimental studies on the effects of potential landscapes on confined polariton states. The spatial confinement of polaritons was realized by imposing two optically-controlled barriers on a one-dimensional ZnO microrod. Two types of quantized polariton states were observed, where energies of the levels depend either linearly or quadratically on their quantum number. The formation of optical traps with parabolic or square-well profiles was confirmed to be responsible for the observed different states. These results demonstrate the importance of the potential landscapes in tailoring the optical properties of exciton polaritons, which would be helpful in the design of polariton-based optoelectronic devices.