Fig. 3: Nonlinear optical susceptibility of the neat film. | Communications Physics

Fig. 3: Nonlinear optical susceptibility of the neat film.

From: Mechanisms of blueshifts in organic polariton condensates

Fig. 3

a Open aperture and b closed-aperture Z-scan data measured at two different incident pump energies 9.5 nJ (black circles) and 438 nJ (red rhombs). The fitting curves (red dashed) in a, b correspond to \({\mathrm{{Im}}}\left[ {\chi ^{\left( 3 \right)}} \right] = 1.71 \times 10^{ - 20}\,\mathrm{m}^{2}\,\mathrm{V}^{- 2}\) and \({\mathrm{{Re}}}\left[ {\chi ^{\left( 3 \right)}} \right] = 2.17 \times 10^{ - 20}\,{\mathrm{{m}}}^{2}\,{\mathrm{V}}^{ - 2}\), respectively. Error bars correspond to the standard deviation of a single Z-scan measurement on a glass substrate.

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