Fig. 2: Polariton lasing emission.
From: Organic polaritonic light-emitting diodes with high luminance and color purity toward laser displays

Angle-resolved PL spectrum measured at P < Pth (a) and P > Pth (b). c PL spectra of LP2 branch at the different pump densities. d The integrated PL intensities (red dots) and line width (black dots) of the LP2 branch as a function of pump density. e The PL decay profiles under different pump densities