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. 2019 Sep 27;5(9):eaax5196. doi: 10.1126/sciadv.aax5196

Fig. 2. Polariton bleach effect at a pump-probe delay time (t2) of 0 ps (optical nonlinearity) as a function of concentration.

Fig. 2

From the pump-probe spectra, the bleach signal (normalized to the maximal linear transmission peak intensity) increases as the molecular concentration decreases.