Femtosecond real-time pump–probe imaging spectroscopy

Furukawa, Naoki; Mair, Chad E.; Kleiman, Valeria D.; Takeda, Jun
November 2004
Applied Physics Letters;11/15/2004, Vol. 85 Issue 20, p4645
Academic Journal
Real-time pump-probe imaging spectroscopy with femtosecond time resolution is demonstrated. This method allows real-time mapping of frequency- and time-resolved transient absorption of materials at once. We can clearly measure the image of the transient absorption spectra of β-carotene with wide temporal and spectral ranges in a short accumulation time. Since the typical accumulation time is about two orders of magnitude shorter than that by the conventional pump-probe technique, this method becomes a powerful spectroscopic tool to study ultrafast relaxation and dynamics on organic/biochemical materials, which easily undergo photofatigue after many repetitions of the pump-probe sequence.


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