Abstract
We have demonstrated that the exciton-polariton mode splitting in semiconductor microcavities can be continuously altered in a wide range, from its maximum to zero, through the change in the exciton oscillator strength. This has been achieved by making use of a quantum confined Stark effect together with angle tuning of the cavity mode. On the basis of the ex-perimental results, we point out a possibility of THz electromagnetic wave radiation from the oscillating dipole associated with the cavity-polariton in biased semiconductor microcavities.
