Pulsed infrared lasers

Dreisewerd, K. Berkenkamp, S. Leisner, A. Rohlfing, A. Menzel, C. Fundamentals of MALDI-MS With Pulsed Infrared Lasers. Int. J. Mass Spectrom. 2003, 226, 189-209. 

The vibration spectra of nitrated l,2,4-triazol-5-ones [611, 614, 615] and their energetic salts [616] are discussed. The thermal decomposition mechanism under rapid heating of thin films of 3-nitro-l,2,4-triazol-5-one was studied by pulsed infrared laser and Fourier-transform infrared spectroscopy [1071],... 

Fig. 7. TOF tandem mass spectrometer. The mass gate selects the ions of interest for photoexcitation by the tunable pulse infrared laser. Photofragment ions are mass-resolved by the reflectron mass spectrometer. (Jude Kelley and Mark A. Johnson, private communication.)...

A typical experimental arrangement for such investigations is depicted in Fig. 8.23. In a flow system, where the reactive collisions take place, the levels (u, J) of the reactant molecules are selectively excited by a pulsed infrared laser. The time-dependent population of excited levels in the reactants or the product molecules are monitored through their fluorescence, detected by fast, cooled infrared detectors (Vol. l,Sect. 4.5). 

Rohlfing, A., Menzel, C., Kukreja, LM., Hillenkamp, F., and Dreisewerd, K. (2003) Photoacoustic analysis of matrix-assisted laser desorption/ ionization processes with pulsed infrared lasers. J. Phys. Chem. B, 107, 12275-12285. 

Fundamentals of matrix-assisted laser desorption/ionization mass spectrometry with pulsed infrared lasers. 

AFM-IR is a cutting-edge technique set up in 2005 by A. Dazzi, a physicist at the University of Paris 11, under the name of PT-IR (photothermally induced resonance), which has revolutionized the domain of infrared spectroscopy [149,150]. It is based on the coupling of an AFM with a tunable pulsed infrared laser emitting in the mid-infrared region (1200-3200 cm ). The sample is laid on the upper surface of a zinc selenide prism, analogous to the one used for ATR... 

Figure 16.24 (a) Free space 3-D display using an infrared pulsed laser, and (b) a 3-D object displayed by the glowing plasma excited by the pulsed infrared laser. Reproduced with permission from SPIE. 

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