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. 2019 Sep 5;10:3995. doi: 10.1038/s41467-019-11961-9

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© The Author(s) 2019

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Fig. 2 — Experimental observation of coherent spin dynamics by Faraday rotation and SHG. Typical measurement of optically induced spin dynamics by σ⁺-polarised (red) and σ⁻-polarised (blue) pump pulses. a Open circles represent Faraday rotation. Closed circles show the relative change of SHG intensity. Solid lines are damped sine (Faraday) and cosine (SHG) fits. b Difference (green) and average (orange) of TR SHG changes corroborating helicity-dependent and helicity-independent contributions, respectively. Solid lines represent fits according to a damped cosine (green) and a single exponential decay (orange)