Hannover 2010 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 8: Poster I

A 8.49: Poster

Dienstag, 9. März 2010, 16:30–19:00, Lichthof

A Fraunhofer diffraction model of non-collinear high harmonic generation — •Andreas Vernaleken, Akira Ozawa, Igor Gotlibovych, Thomas Udem, and Theodor W. Hänsch — Max-Planck-Institut für Quantenoptik, Garching

Non-collinear high harmonic generation (NCHHG) is the nonlinear process where two infrared driving beams focused into a gas target at a small angle cause collimated emission of high harmonic radiation along the bisector of the driving beams [1]. Most of the striking features of NCHHG that we observed in our experiments can now be reproduced by our improved numerical simulation. The simulation results suggest that NCHHG can be seen as the Fraunhofer diffraction pattern of the high harmonic emission profile in the interaction region that is created by interference between the two driving beams.

A sound understanding of the physics of NCHHG is crucial considering its potential as a combined method for efficient generation and outcoupling of extreme ultraviolet radiation in future cavity-assisted HHG experiments at high power and high repetition rate. We will present the relevant details of our model and its current limitations and discuss possible future applications of NCHHG.

[1]  Ozawa et al., Opt. Express 16, 6233 (2008)