Fig. 2: Time-resolved optical spectroscopy on sub-ps timescale.
From: Ultrafast charge-transfer-induced spin transition in cobalt-tungstate molecular photomagnets
a, b Time delay ΔmOD (ΔOD ×10−3) maps measured at room temperature for CsCoW and CoW. Each map consists of three parameters: wavelength on the horizontal axis, delay time on the vertical axis, and ΔmOD as a color bar. The negative and positive delays indicate before and after the photoexcitation. The red and blue dashed lines represent the time traces at 600 nm and 700 nm, respectively. c, d Time traces of ΔmOD at 600 nm ( ± 15 nm, red open circles) and 700 nm ( ± 15 nm, blue open circles) for CsCoW and CoW, respectively. The fit at 700 nm (blue) represents the exponential dynamics toward the photoinduced (PI) state, resembling the high temperature (HT) state. The fit at 600 nm (red) includes contributions from the PI state (orange) and an intermediate photoexcited (PE) state (green). The inset black line shows the oscillation fitting function. (Supplementary Note 6).
