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A: Fachverband Atomphysik

A 24: Attosecond physics I

A 24.1: Vortrag

Donnerstag, 17. März 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’Huillier¹ — ¹Lund 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).