Polarization sensitive ultrafast mid-IR pump probe micro-spectrometer with diffraction limited spatial resolution
Polarization sensitive ultrafast mid-IR pump probe micro-spectrometer with diffraction limited spatial resolution
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DOI：
10.1364/oe.21.008357
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发表时间：
2013-04-08
期刊：
影响因子：
3.8
通讯作者：
Van Thor, J. J.
中科院分区：
文献类型：
--
作者：
Kaucikas, M.;Barber, J.;Van Thor, J. J.
本文介绍了一种利用史瓦西物镜将探测光聚焦到衍射极限点的超快瞬态红外光谱仪。因此，在中红外光谱区域以非常高的空间分辨率进行测量。此外，调制探测光的偏振使得能够检测样品的瞬态二向色性。这些能力的设置被施加到研究瞬态吸收的光系统II核心复合物和图像的亚甲基蓝氯化物染料的有组织的电影。此外，还对泵浦探针测量中的噪声源进行了研究。在10（4）次采集中，当前设置的预测噪声水平为8.25 mu OD，与9.6 mu OD的实验观察结果相比非常好。(C)2013年美国光学学会
A setup of ultrafast transient infrared IR spectrometer is described in this paper that employed Schwarzschild objectives to focus the probe beam to a diffraction limited spot. Thus measurements were performed with very high spatial resolution in the mid-IR spectral region. Furthermore, modulating the polarization of the probe light enabled detecting transient dichroism of the sample. These capabilities of the setup were applied to study transient absorption of Photosystem II core complex and to image an organized film of methylene blue chloride dye. Moreover, a study of noise sources in a pump probe measurement is presented. The predicted noise level of the current setup was 8.25 mu OD in 10(4) acquisitions and compared very well with the experimental observation of 9.6 mu OD. (C) 2013 Optical Society of America