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We present key features of the strong coupling regime in a ZnSe-based microcavity; anticrossing with a normal mode splitting of 23.6 meV at 20 K; narrowing of the lower polariton linewidth near resonance; and composite evolution of the cavity-polaritons. The heavy-hole exciton oscillator strength, fosc= 1.78 times 1013 cm-2 is also deduced.
We demonstrate level-repulsion of exciton-polaritons in ZnSe/Zn0.9Cd0.1Se quantum wells transferred to SiO2/Ta2O5 mirrors using epitaxial liftoff to fabricate our microcavities. The heavy-hole exciton oscillator strength is calculated to be 5.7 times1012 cm-2 .
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