Fig. 4: Condensation in the lattice’s dispersion relation while tuning the microcavity.
From: Tunable exciton–polariton condensation in a two-dimensional Lieb lattice at room temperature
Sequence of Fourier-space images obtained at a constant excitation density above condensation threshold. The length of the cavity is increased from left to right, bringing first the s-band in resonance with the vibronic relaxation that is most effective near 2.53 eV (200 meV below the exciton reservoir), then the p-band (near the middle) and finally the d-band. The smearing and fragmentation of the bands is caused by fragmentation of the condensates due to disorder.
