Photoluminescence study of cavity-polariton-mode splitting using high-contrast selectively oxidized AlAs/GaAs mirrors

Photoluminescence (PL) has been used to study cavity-polariton-mode splitti ng in a strongly coupled microcavity that utilizes high-contrast oxidized A lAs/GaAs mirrors. The cavity structure was specifically designed to reduce nonradiative recombination at the oxide-semiconductor interfaces and takes full advantage of the high-contrast mirrors to reduce the effective cavity length, and increase the exciton-photon coupling strength. The cavity-polar iton splitting measured at room temperature was 6.2 meV, which we believe t o be the first ever reported PL splitting measured at room temperature usin g an oxide-based microcavity. The temperature dependence of the cavity-pola riton splitting has also been measured and is well described within a semic lassical polariton model. (C) 1999 American Institute of Physics.