Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 59: Ultrakurze Laserpulse

Q 59.2: Vortrag

Freitag, 16. März 2012, 10:45–11:00, V38.04

Generation of intensive tunable femtosecond pulses in the vacuum-UV and observation of wave packet dynamics in high excited states of NO — Peter Trabs, •Masood Ghotbi, Andrea Lübcke, Arnaud Rouzée, Franziska Buchner, and Marc Vrakking — Max-Born-Institut, Berlin

We developed a tunable source in the vacuum-UV(VUV) spectral range generating femtosecond pulses between 147 nm and 151 nm at 1 kHz repetition rate. Across the whole tuning range we obtained pulse energies of about 100 nJ with sub-50 fs pulse durations. The VUV pulses were generated by a difference-frequency four-wave mixing process in argon or krypton between the third harmonic of an amplified Ti:spphire laser system and the signal output of an optical parametric amplifier.

This source was recently used to study wave packet dynamics in high excited states of NO molecules by time-resolved photoelectron imaging. We will briefly describe the results.