Ghosh Ayanjeet, Serrano Arnaldo L, Oudenhoven Tracey A, Ostrander Joshua S, Eklund Elliot C, Blair Alexander F, Zanni Martin T
Opt Lett. 2016 Feb 1;41(3):524-7. doi: 10.1364/OL.41.000524.
Aided by advances in optical engineering, two-dimensional infrared spectroscopy (2D IR) has developed into a promising method for probing structural dynamics in biophysics and material science. We report two new advances for 2D IR spectrometers. First, we report a fully reflective and totally horizontal pulse shaper, which significantly simplifies alignment. Second, we demonstrate the applicability of mid-IR focal plane arrays (FPAs) as suitable detectors in 2D IR experiments. FPAs have more pixels than conventional linear arrays and can be used to multiplex optical detection. We simultaneously measure the spectra of a reference beam, which improves the signal-to-noise by a factor of 4; and two additional beams that are orthogonally polarized probe pulses for 2D IR anisotropy experiments.
在光学工程进步的助力下，二维红外光谱（2D IR）已发展成为一种在生物物理学和材料科学中探测结构动力学的有前景的方法。我们报告了二维红外光谱仪的两项新进展。首先，我们报告了一种全反射且完全水平的脉冲整形器，它显著简化了校准过程。其次，我们证明了中红外焦平面阵列（FPA）作为二维红外实验中合适探测器的适用性。焦平面阵列比传统线性阵列具有更多像素，可用于多路复用光学检测。我们同时测量参考光束的光谱，这将信噪比提高了4倍；以及另外两束光，它们是用于二维红外各向异性实验的正交偏振探测脉冲。
