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Ultrabroadband femtosecond two-dimensional ultraviolet transient absorption

机译:超宽带飞秒二维紫外线瞬态吸收

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摘要

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.
机译:我们为300 nm左右的紫外线提供了一个宽带二维瞬态吸收装置,其时间分辨率为150 fs。窄带,频率可调泵浦脉冲和宽带探测脉冲是由以20 kHz重复频率工作的非共线光学参量放大器的输出产生的,并在光谱解析的瞬态吸收实验中进行了组合。该装置的高重复率和低噪声使我们能够获取高质量的二维数据,这些数据是时间延迟的函数,沿着探头和泵浦轴的频率窗口分别为10,000和8000 cm〜(-1),无与伦比。在溶解于环己烷中的2,5-二苯基恶唑上证明了该装置的性能。

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