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A: Fachverband Atomphysik

A 25: Interaction with Strong or Short Laser Pulses III

A 25.2: Talk

Thursday, March 5, 2009, 10:45–11:00, VMP 8 R208

Non-collinear high harmonic generation — •Andreas Vernaleken, Akira Ozawa, Igor Gotlibovych, Waldemar Schneider, Thomas Udem, and Theodor W. Hänsch — Max-Planck-Insitut für Quantenoptik, Garching

We present the results of our investigation of non-collinear high harmonic generation (NCHHG). In conventional high harmonic generation (HHG), the generated harmonic radiation is emitted collinearly with the fundamental beam. In contrast, when focusing two infrared (IR) beams into a xenon gas jet at a small angle, we observe collimated high harmonic radiation of up to 21st order in a direction which is non-collinear with respect to the driving IR beams.

We have systematically investigated the dependence of NCHHG on experimental parameters such as the delay between the driving pulses for different harmonic orders and will compare our experimental results to a numerical simulation based on a simple model.

The potential application of NCHHG as a combined method for efficient generation and outcoupling of extreme ultraviolet radiation in the next generation of cavity-assisted HHG experiments will be discussed.