Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 28: Attosecond physics II

A 28.7: Vortrag

Mittwoch, 16. März 2011, 12:15–12:30, BAR 205

Attosecond Twin-Pulse Control by Generalized Kinetic Heterodyne Mixing — •Philipp Raith, Christian Ott, and Thomas Pfeifer — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany

Attosecond double pulses with defined spectral properties (e.g. spectral-phase difference between the pulses) are a useful tool for spectral interferometry measurements of attosecond quantum dynamics in atoms and molecules. For this purpose, we study the generation and manipulation of attosecond double-pulse (called twin pulse at identical intensities of the two pulses) production in high-order harmonic generation by a combination of two-color laser fields and carrier-envelope-phase (CEP) control methods. It is shown that both relative amplitude and phase of the double pulses can be independently set by making use of multidimensional parameter control methods. Two technical implementation routes are discussed: kinetic heterodyne mixing of a strong laser field and its second harmonic and split-spectrum phase-step control using a single spectrally coherent broad-band laser field. This multidimensional control scheme including the CEP can be considered a general approach for controlling electron dynamics for applications ranging from electron localization in molecules to attosecond pulse shaping.