Réhault Julien, Maiuri Margherita, Oriana Aurelio, Cerullo Giulio
IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
Rev Sci Instrum. 2014 Dec;85(12):123107. doi: 10.1063/1.4902938.
We present a simple experimental setup for performing two-dimensional (2D) electronic spectroscopy in the partially collinear pump-probe geometry. The setup uses a sequence of birefringent wedges to create and delay a pair of phase-locked, collinear pump pulses, with extremely high phase stability and reproducibility. Continuous delay scanning is possible without any active stabilization or position tracking, and allows to record rapidly and easily 2D spectra. The setup works over a broad spectral range from the ultraviolet to the near-IR, it is compatible with few-optical-cycle pulses and can be easily reconfigured to two-colour operation. A simple method for scattering suppression is also introduced. As a proof of principle, we present degenerate and two-color 2D spectra of the light-harvesting complex 1 of purple bacteria.
我们展示了一种简单的实验装置，用于在部分共线泵浦 - 探测几何结构中进行二维（2D）电子光谱实验。该装置使用一系列双折射楔形物来产生并延迟一对锁相的共线泵浦脉冲，具有极高的相位稳定性和可重复性。无需任何主动稳定或位置跟踪即可进行连续延迟扫描，并能够快速且轻松地记录二维光谱。该装置在从紫外到近红外的宽光谱范围内工作，与少光周期脉冲兼容，并且可以轻松重新配置为双色操作。还介绍了一种简单的散射抑制方法。作为原理验证，我们展示了紫色细菌光捕获复合物1的简并和双色二维光谱。
