0000000000870844

AUTHOR

J. Kruse

showing 2 related works from this author

Realization of time-resolved two-vacuum-ultraviolet-photon ionization

2009

International audience; Ultrafast dynamics of excited molecules is studied through time-resolved two-vacuum-ultraviolet (vuv)- photon ionization using a nonlinear volume autocorrelator unit. The two-vuv-photon process is induced by the intense fifth harmonic radiation of a femtosecond Ti:sapphire laser. In a proof-of-principle experiment, ultrafast dynamics of excited ethylene and oxygen molecules are investigated. Molecular decay times are deduced by comparing the experimental data with the results of a numerical model that accounts for the spatial and temporal characteristics of the harmonic field. The present experiments pave a convenient way for time domain investigations in the vuv-xuv s…

spectroscopyattosecondPhoton[ PHYS.PHYS.PHYS-ATOM-PH ] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]Physics::Opticsphotoionisationnm01 natural sciences7. Clean energyAtmospheric-pressure laser ionization010309 opticsFrequency conversionIonizationhigher order harmonic generation0103 physical sciencesPhysics::Atomic and Molecular Clustersethylenemoleculestwo-photon processesPhysics::Chemical Physics010306 general physicsUltrafast dynamicsPhysics[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]photodissociationdynamicsVUVAtomic and Molecular Physics and Opticslaser-pulsesVacuum ultravioletExtreme ultravioletmolecule-photon collisionsXUX32.80.Rm 42.65.Re 42.65.KyHHGAtomic physicsultrafast internal-conversionorganic compoundsphysicsRealization (systems)oxygen
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Tracking Autoionizing-Wave-Packet Dynamics at the 1-fs Temporal Scale

2010

We present time-resolved studies and Fourier transform spectroscopy of inner-shell excited states undergoing Auger decay and doubly excited autoionizing states, utilizing coherent extreme-ultraviolet (XUV) radiation continua. Series of states spanning a range of ∼4  eV are excited simultaneously. An XUV probe pulse tracks the oscillatory and decaying evolution of the formed wave packet. The Fourier transform of the measured trace reproduces the spectrum of the series. The present work paves the way for ultrabroadband XUV spectroscopy and studies of ultrafast dynamics in all states of matter.

PhysicsWave packetGeneral Physics and Astronomy01 natural sciences7. Clean energyFourier transform spectroscopy010309 opticssymbols.namesakeFourier transformAutoionizationExcited state0103 physical sciencesPhysics::Atomic and Molecular ClusterssymbolsState of matterAtomic physics010306 general physicsSpectroscopyUltrashort pulsePhysical Review Letters
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