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Dresden 2011 – scientific programme

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A: Fachverband Atomphysik

A 24: Attosecond physics I

A 24.1: Talk

Thursday, March 17, 2011, 16:30–16:45, BAR 205

Probing single-photon ionization on the attosecond time scale — •Kathrin Klünder1, J. Marcus Dahlström1, Mathieu Gisselbrecht1, Thomas Fordell1, Marko Swoboda1, Diego Guénot1, Per Johnsson1, Jérémie Caillat2, Johan Mauritsson1, Alfred Maquet2, Richard Taïeb2, and Anne L’Huillier11Lund University, Department of Physics, Lund, Sweden — 2Université Pierre et Marie Curie, Laboratoire de Chimie Physique-Matière et Rayonnement, France

Attosecond light sources allow us to measure fundamental quantities such as the time it takes for an electron to escape from an atom after photoabsorption [1]. We present an interferometric technique to time resolve photoemission on the attosecond time scale. We employ an attosecond pulse train for the excitation and a weak infrared laser field to probe the outgoing electron wave packet. We determine a difference in photoemission delay between electrons emitted from the 3s and from the 3p shells in argon as a function of excitation energy. We address the question of the influence of the probing field in the measurement process on this short time scales.
[1] M. Schultze et al., Science 328, 1658 (2010).

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