Ultrafast 2D IR microscopy
Ultrafast 2D IR microscopy
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DOI：
10.1364/oe.22.018724
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发表时间：
2014-07-28
期刊：
影响因子：
3.8
通讯作者：
Tokmakoff, Andrei
中科院分区：
文献类型：
--
作者：
Baiz, Carlos R.;Schach, Denise;Tokmakoff, Andrei
我们描述了一种用于测量具有微米尺度空间分辨率、亚皮秒时间分辨率和二维红外的分子结构信息的异质样品的二维红外（2D IR）光谱的显微镜，使得能够通过频率、时间和空间的相关性来测量振动动力学。该装置基于完全共线的“单光束”几何结构，其中所有脉冲沿沿着相同的光学器件传播。偏振、斩波和相位循环用于隔离感兴趣的2D IR信号。此外，我们证明了使用的振动寿命作为造影剂的分子环境中的微观变化成像。2014美国光学学会Optical Society of America
We describe a microscope for measuring two-dimensional infrared (2D IR) spectra of heterogeneous samples with mu m-scale spatial resolution, sub-picosecond time resolution, and the molecular structure information of 2D IR, enabling the measurement of vibrational dynamics through correlations in frequency, time, and space. The setup is based on a fully collinear "one beam" geometry in which all pulses propagate along the same optics. Polarization, chopping, and phase cycling are used to isolate the 2D IR signals of interest. In addition, we demonstrate the use of vibrational lifetime as a contrast agent for imaging microscopic variations in molecular environments. (C)2014 Optical Society of America