Half-broadband two-dimensional electronic spectroscopy with active noise reduction.
Half-broadband two-dimensional electronic spectroscopy with active noise reduction.
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DOI：
10.1364/oe.500017
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发表时间：
2023-10
期刊：
影响因子：
3.8
通讯作者：
Giovanni Bressan;I. Heisler;Greg Greetham;Amy Edmeades;S. Meech
中科院分区：
文献类型：
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作者：
Giovanni Bressan;I. Heisler;Greg Greetham;Amy Edmeades;S. Meech
二维电子光谱（2DES）提供了详细的洞察凝聚相相干超快分子动力学。在这里，我们报告了一个参考的宽带泵浦压缩连续探测半宽带（HB）2DES光谱仪在部分共线的几何形状。为了优化信噪比（SNR），我们实现了主动降噪参考，这是以前没有应用在2DES。该方法是校准对恶嗪染料甲酚紫的良好特征的2DES响应，并证明在可见光波长的光致变色光开关1，2-双（2-甲基-5-苯基-3-噻吩基）全氟环戊烯（DAE）。通过有源参考，SNR提高了10.2倍。这是说明在一个应用程序中，以解决一个低频模式的激发电子态的DAE，产生新的数据的反应坐标。我们表明，主动降噪参考，再加上快速的数据收集，允许提取弱振动特征，最明显的是在DAE的激发电子态的低频模式。
Two-dimensional electronic spectroscopy (2DES) provides detailed insight into coherent ultrafast molecular dynamics in the condensed phase. Here we report a referenced broadband pump-compressed continuum probe half-broadband (HB) 2DES spectrometer in a partially collinear geometry. To optimize signal-to-noise ratio (SNR) we implement active noise reduction referencing, which has not previously been applied in 2DES. The method is calibrated against the well characterized 2DES response of the oxazine dye cresyl violet and demonstrated at visible wavelengths on the photochromic photoswitch 1,2-Bis(2-methyl-5-phenyl-3-thienyl) perfluorocyclopentene (DAE). The SNR is improved by a factor of ∼2 through active referencing. This is illustrated in an application to resolve a low frequency mode in the excited electronic state of DAE, yielding new data on the reaction coordinate. We show that the active noise reduction referencing, coupled with the rapid data collection, allows the extraction of weak vibronic features, most notably a low frequency mode in the excited electronic state of DAE.