Fig. 5: Power dependence of single and square-shaped pump spots.
From: Optically trapped room temperature polariton condensate in an organic semiconductor
a–c PL intensity, linewidth, and peak energy shift of spatially resolved spectra versus pump fluence pumped by single (open squares) and four (solid circles) laser spots. Error bars correspond to the standard deviation over five different sample locations. The grey areas mark the transition to an outwards propagating regime of polaritons when pumped by a single Gaussian spot. The dashed black line in b is tangent to the linewidth trend above the threshold pumped by the square array.
