Applied Spectroscopy · 2010 · 194 citations · 27 references
Natural SciencesChemistryMaterials ScienceAnalytical ChemistryPhotonicsSpectroscopyAbsorption SpectroscopyInfrared SpectroscopyOptical SpectroscopyRaman SpectroscopyTime-resolved SpectroscopyUltrafast OpticsFemtosecond SpectroscopyGallium ArsenideIndium Gallium ArsenideIndium Gallium Arsenide DetectorsStimulated Raman SpectroscopyTime-resolved Infrared SpectroscopyTime-resolved Raman SpectroscopyUltrafast Spectroscopy
We report the development of a high-sensitivity time-resolved infrared and Raman spectrometer with exceptional experimental flexibility based on a 10-kHz synchronized dual-arm femtosecond and picosecond laser system. Ultrafast high-average-power titanium sapphire lasers and optical parametric amplifiers provide wavelength tuning from the ultraviolet (UV) to the mid-infrared region. Customized silicon, indium gallium arsenide, and mercury cadmium telluride linear array detectors are provided to monitor the probe laser intensity in the UV to mid-infrared wavelength range capable of measuring changes in sample absorbance of ΔOD ~ 10(-5) in 1 second. The system performance is demonstrated for the time-resolved infrared, two-dimensional (2D) infrared, and femtosecond stimulated Raman spectroscopy techniques with organometallic intermediates, organic excited states, and the dynamics of the tertiary structure of DNA.
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