0000000000880568

AUTHOR

Paraskevas Tzallas

showing 2 related works from this author

Laser-induced field-free alignment of the OCS molecule

2007

We investigate the dynamical alignment of jet-cooled OCS molecules induced by a short laser pulse. The alignment is measured through the orientational contribution of the optical Kerr effect using a second weak laser pulse as a probe. Maximum alignment is observed at conditions close to saturation of ionization. The results are analysed with a quantum mechanical model solving for the rotational dynamics.

PhysicsKerr effectField (physics)Triatomic moleculePhysics::OpticsNonlinear opticsCondensed Matter PhysicsLaserAtomic and Molecular Physics and Opticslaw.inventionPulse (physics)lawIonizationPhysics::Atomic PhysicsAtomic physicsSaturation (chemistry)Journal of Physics B: Atomic, Molecular and Optical Physics
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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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