Fig. 2: Ultrafast transient reflectivity measurements. | Nature Communications

Fig. 2: Ultrafast transient reflectivity measurements.

From: Mahan excitons in room-temperature methylammonium lead bromide perovskites

Fig. 2

a Color-coded map of ΔRR as a function of probe photon energy and time delay between pump and probe. The pump photon energy is 3.10 eV and the estimated carrier density is n = 5 × 1018 cm−3. The time resolution is 50 fs. b, c ΔRR transient spectra in the temporal windows b from −100 fs to 500 fs and c from 500 fs to 8 ps.

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