Fig. 3: Single polariton propagation measured in transmission configuration.
a Energy dispersion in the microcavity at the photon injection point in the transmission configuration compared with the emission spectrum of the selected QD, shown in panel b; note that the exciton energy of the QD coincides with the state of the LPB with in-plane momentum ky ≈ 0.28 µm−1; this allows resonant pumping of the microcavity with single photons from the QD; the second-order correlation function in Fig. 1b is precisely obtained for this QD emission spectrum; Single-polariton propagation obtained by matching the polariton dispersion in (a) with the single photons corresponding to (b). c, d Single-polariton propagation across a defect naturally occurring in the microcavity; an interference pattern appears due to the self-interference between the incoming wavefunction and its scattering against the defect; the red circle indicates the position of the structural defect
