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Opt Lett. 2012 Jun 15;37(12):2337-9. doi: 10.1364/OL.37.002337.

Ultrabroadband femtosecond two-dimensional ultraviolet transient absorption.

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  • 1Laboratory of Ultrafast Spectroscopy, EPFL, CH-1015 Lausanne, Switzerland. gerald.aubock@epfl.ch


We present a broadband two-dimensional transient absorption setup for the UV around 300 nm with a time resolution of 150 fs. A narrowband, frequency tunable pump pulse and a broadband probe pulse are generated from the output of a noncollinear optical parametric amplifier operated at 20 kHz repetition rate and combined in a spectrally resolved transient absorption experiment. The high repetition rate and low noise of the setup allow us to acquire high quality two-dimensional data as a function of time delay with an unsurpassed frequency window of 10,000 and 8000  cm(-1) along the probe and pump axis, respectively. The performance of the setup is demonstrated on 2,5-Diphenyloxazol dissolved in cyclohexane.

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