Time-resolved pump-probe spectroscopy enables the study of ultrafast phenomena that cannot be studied with conventional spectroscopic techniques.
In this spectroscopy, a first pulse (the pump) irradiates the sample causing it to be excited or modified, and a second pulse (the probe) impinges on the sample after an adjustable delay time.
By acquiring the variation of the transmitted or reflected probe signal as a function of the pump-probe delay, it is possible to temporally follow the variation of the optical response of the sample induced by the irradiation with the pump.
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