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Sketch of (a) sample layer structure and [(b)–(d)] microdisk/ring preparation. [(d)] For PL measurement the sample is directly excited perpendicular to the surface, the PL is collected from the glass support. Electron microscope images of a microring (outer ) after first etching step.
PL spectra of a single microring for varying sample temperature. Spectral range for (a) weak and (b) strong coupling of the exciton with the cavity mode. For better visibility the spectra are vertically offset.
Peak position vs temperature for the peaks of Fig. 2. (a) Crossing of exciton and cavity mode (denoted by and , respectively). (b) Anticrossing due to strong coupling. In the range of resonance the exciton and cavity mode are transformed into UP and LP polaritons, which are separated by the Rabi splitting .
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