Molecular dynamics observed with nonlinear autocorrelation in the VUV range

29th International Conference on Photonic, Electronic, and Atomic Collisions

Rompotis, Dimitris^1,2,3 ; Gebert, Thomas^1,2,3 ; Schepp, Oliver^1,2,3 ; Baumann, Arne^1,2,3 ; Wieland, Marek^1,2,3 ; Drescher, Markus^1,2,3

Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, Hamburg

22761, Germany^1

Center for Free-Electron-Laser-Science, Luruper Chaussee 149, Hamburg

22761, Germany^2

Center for Ultrafast Imaging, Luruper Chaussee 149, Hamburg

22761, Germany^3

关键词: Interferometric autocorrelation;    Ion spectrometers;    Multiphoton transitions;    Nonlinear autocorrelation;    Oxygen molecule;    Photodissociation dynamics;    Temporal resolution;    Vacuum ultraviolets;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/11/112106/pdf
DOI  :  10.1088/1742-6596/635/11/112106

来源: IOP

【 摘 要 】

160 nm vacuum-ultraviolet pulses generated as the 5thharmonic of an 800 nm femtosecond laser are sufficiently energetic to drive multiphoton transitions in molecules. 2ndorder intensity- as well as interferometric autocorrelation were used as time-metrology tools for studying the photodissociation dynamics in ethylene and oxygen molecules. An imaging ion spectrometer enables the separate capture of dynamics in different fragmen-tation channels. Excitation in a non-collinear beam geometry is shown to deliver temporal resolution already in a single shot.