Towrie Michael, Gabrielsson Anders, Matousek Pavel, Parker Anthony W, Rodriguez Ana Maria Blanco, Vlcek Antonín
Central Laser Facility, CCLRC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom.
Appl Spectrosc. 2005 Apr;59(4):467-73. doi: 10.1366/0003702053641397.
We describe an apparatus that provides, for the first time, a seamless bridge between femtosecond and microsecond time-resolved Raman and infrared vibrational spectroscopy. The laser system comprises an actively Q-switched sub-nanosecond pulsed kilohertz laser electronically synchronized to an ultrafast titanium sapphire regenerative amplifier to within 0.2 ns. The ultrafast amplifier provides the stable probe light source enabling high-sensitivity infrared vibrational spectroscopy of transients. Time-resolved infrared spectra of the excited-state relaxation dynamics of metal carbonyl compounds are presented to illustrate the capability of the apparatus, and transient data is resolved from 1 picosecond to over 100 microseconds. The results are compared to conventional nanosecond Fourier transform infrared (FT-IR) and laser based flash photolysis time-resolved infrared technology.
我们描述了一种首次在飞秒和微秒时间分辨拉曼光谱与红外振动光谱之间提供无缝连接的仪器。该激光系统包括一个主动调Q的亚纳秒脉冲千赫兹激光器，它与一个超快钛宝石再生放大器在电子上同步至0.2纳秒以内。超快放大器提供稳定的探测光源，从而实现对瞬态的高灵敏度红外振动光谱分析。给出了金属羰基化合物激发态弛豫动力学的时间分辨红外光谱，以说明该仪器的性能，并且瞬态数据的分辨时间范围从1皮秒到超过100微秒。将结果与传统的纳秒傅里叶变换红外（FT-IR）和基于激光的闪光光解时间分辨红外技术进行了比较。
