BoxCARS 2D IR spectroscopy with pulse shaping
Al-Mualem, ZA (Al-Mualem, Ziareena A.); Chen, XB (Chen, Xiaobing); Shirley, JC (Shirley, Joseph C.); Xu, C (Xu, Cong); Baiz, CR (Baiz, Carlos R.)
Optics Express, 2023, Volume 31, pp. 2700-2709.
BoxCARS and pump-probe geometries are common implementations of two-dimensional infrared (2D IR) spectroscopy. BoxCARS is background-free, generally offering greater signal-to-noise ratio, which enables measuring weak vibrational echo signals. Pulse shapers have been implemented in the pump-probe geometry to accelerate data collection and suppress scatter and other unwanted signals by precise control of the pump-pulse delay and carrier phase. Here, we introduce a 2D-IR optical setup in the BoxCARS geometry that implements a pulse shaper for rapid acquisition of background-free 2D IR spectra. We show a signal-to-noise improvement using this new fast-scan BoxCARS setup versus the pump-probe geometry within the same configuration. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement |
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