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. 2015 Sep 2;6:8063. doi: 10.1038/ncomms9063

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Two-dimensional plots of transient differential transmission ΔT/T₀ spectra of the TMD/polymer film. Each plot represents the measurement result—(a) MoSe₂ and (b) MoS₂. (c) Time-resolved optical-pump and optical-probe data. Normalized ΔT dynamics are shown for polymer-exfoliated MoS₂ nanosheets (red), bulk (black) and monolayer MoS₂ (blue). Inset: ΔT dynamics plotted with a log scale on x-axis. (d) Transient dynamics measured by the optical-pump and THz-probe spectroscopy. Pump-induced field change (ΔE) of the bulk and polymer-exfoliated MoS₂ are plotted as a function of the pump–probe delay. Both of the signals were fitted with a bi-exponential decay. Inset: transient THz dynamics plotted on the log scale to emphasize the slow decay dynamics of the exfoliated sample.