Hannover 2016 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Atomic systems in external fields

A 20.2: Poster

Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof

Simulation of attosecond-streaking in dielectric nanospheres — •Lennart Seiffert¹, Sergey Zherebtsov², Philipp Rupp², Philipp Henning¹, Matthias Kling², and Thomas Fennel¹ — ¹Universität Rostock — ²Ludwig-Maximilians-Universität München

Electron transport in dielectrics is of fundamental importance for electronic devices and plays a crucial role in photoelectron spectroscopy and microscopy. The effective escape depth of photoemission from dielectrics depends strongly on inelastic collisions that typically take place on attosecond timescales and may thus be accessible with attosecond metrology [1]. So far, attosecond-streaking has been applied to atomic systems to study ionization delays [2] and utilized to investigate electron transport in metals [3] and adlayer-covered metals [4]. A promising approach to establish attosecond-streaking in dielectrics relies on the utilization of isolated nanosolids to circumvent space charge problems. Here, we simulate attosecond-streaking at isolated SiO₂ nanospheres and investigate the impact of electron transport on the streaking spectra. Our semi-classical Monte-Carlo trajectory simulations [5] support that attosecond-streaking can be used as a universal tool to directly clock the inelastic scattering time in dielectrics [6].

[1] R. Kienberger et al., Nature 427, 817-821 (2004)

[2] M. Schultze et al., Science 328, 1658-1662 (2010)

[3] A. L. Cavalieri et al., Nature 449, 1029-1032 (2007)

[4] S. Neppl et al., Nature 517, 342-346, (2015)

[5] F. Süßmann et al., Nat Commun. 6, 7944 (2015)

[6] F. Calegari et al., in preparation