Vibrational ladder climbing in NO using ultrashort IR laser pulses

TitleVibrational ladder climbing in NO using ultrashort IR laser pulses
Publication TypeBook Chapter
Year of Publication1997
AuthorsD.J Maas, D.I Duncan, A.FG van der Meer, W.J van der Zande, L.D Noordam
EditorP. Lambropoulos, H. Walther
Book TitleMultiphoton Processes 1996
Series TitleInstitute of Physics Conference Series
ISBN Number0951-32480-7503-0443-X

Chirped excitation of an electronic ladder system has shown complete transfer of the population to the top-level of the ladder system. Similar excitation of vibrational ladders in molecules may provide a tool for state-selective chemistry. Experimental results on the climbing of the anharmonic vibrational ladder of nitric oxide (NO), by irradiating the molecule with femtosecond infrared (IR) pulses, are presented. The free-electron laser FELIX is tuned to lambda = 5.3 mu m with a bandwidth of Delta lambda = 0.3 mu m, corresponding to a pulse duration of 150 femtoseconds. Transfer to the excited states of NO is monitored by 1+1 REMPI. Population is found up to v = 5, the highest level within reach of the IR bandwidth. The average transfer per step of the ladder is found to be 17%.



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