Fig. 2. Nonlinear quench of trion-polariton splitting.

a–c Cavity scan of LG₀₀ mode across the trion resonance for different pump powers: 10, 20 and 70 nW, respectively. The peak energy of the pump laser is fixed at  ~1.62 eV. Pseudo-colour scale is logarithmic. Estimates for the trion Rabi splittings are obtained by fitting extracted peak positions for each piezo step with a coupled oscillator model. Inset: schematic diagram showing how the energies MPB and LPB are renormalised in the case of phase space filling effect leading to reduction of Rabi-splitting between trion level and the bare photon mode.