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A: Fachverband Atomphysik

A 33: Collisions, scattering and recombination

A 33.6: Vortrag

Donnerstag, 26. März 2015, 15:45–16:00, C/kHS

Atomic-scale imaging of molecular bonds with laser-induced electron diffraction — •Benjamin Wolter¹, Michael G. Pullen¹, Anh-Thu Le², Matthias Baudisch¹, Michele Sclafani¹, Hugo Pires¹, Arne Senftleben³, Claus Dieter Schröter⁴, Joachim Ullrich^4,5, Robert Moshammer⁴, Chii-Dong Lin², and Jens Biegert^1,6 — ¹ICFO - Institut de Ciències Fotòniques, Mediterranean Technology Park, Castelldefels (Barcelona), Spain — ²J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, Kansas, USA — ³Universität Kassel, Institut für Physik and CINSaT, Kassel, Germany — ⁴Max - Planck - Institut für Kernphysik, Heidelberg, Germany — ⁵Physikalisch - Technische Bundesanstalt, Braunschweig, Germany — ⁶ICREA - Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain

Dynamic imaging of molecular dynamics is one of the grand challenges of science as it requires sub-Ångström spatial and few femtosecond temporal resolutions. These demands are fulfilled by laser-induced electron diffraction (LIED), where a molecule is structurally probed with its own returning electron after tunnel ionization induced by a strong mid-IR laser field. Here, we present the retrieval of multiple bond lengths from polyatomic molecules by simultaneously measuring the C-C and C-H bond lengths of aligned acetylene. Our approach is based on the combination of an ultrafast 160 kHz mid-IR source with full 3D electron-ion coincidence detection towards investigating ultrafast processes like e.g. dissociation or proton migration.