Fig. 3: Controlled loading of the polariton condensate in the lattice. Off-site versus on-site pumping and formation of corresponding gap-state condensates.
From: Room temperature organic exciton–polariton condensate in a lattice
a, f, g Far-field spectra below (left) and above (right) the condensation threshold, corresponding with the pump-potential alignment inserted with a sketch of the position of the pump laser spot (green) aligned with respect to the polariton potential. White lines show calculated single-particle energy bands. b Microscope image of the investigated device, indicating the positioning of the pump spot for on-site pumping. c Spatial coherence measurement under on-site excitation above threshold. d Extracted coherent magnitude and e phase of the condensate in the lattice. The centro-symmetric mirror point is indicated with a green circle in c–e.
