Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 49: Ultrashort Laser Pulses: Generation and Applications

Q 49.1: Vortrag

Donnerstag, 9. März 2017, 14:30–14:45, P 5

Frequency conversion from the near-infrared to the deep UV with an MgO crystal — •Dennis Mayer, Mario Niebuhr, Christian Matthaei, Axel Heuer, and Markus Gühr — Institut für Physik und Astronomie, Universität Potsdam

Femtosecond pulses in the deep and vacuum ultraviolet region are ideal probes for ultrafast molecular and solid state photoelectron spectroscopy. Due to the recent progress in amplified high repetition rate sources, the nonlinear conversion schemes established at kHz repetition rates need to be scaled to a regime of higher average flux and lower per pulse energy. Newly established solid state harmonic generation provides advantages over conventional gas phase harmonic generation in terms of the conversion efficiency [1]. However, this comes at the cost of higher absorption and shorter effective harmonic generation length.

We concentrate on the generation of harmonics in wide bandgap insulators and on the harmonics emitted below the bandgap. We utilize a 100 kHz amplified Yb:KGW system and present a systematic study of femtosecond nonlinear conversion in MgO.

[1] Y.S. You et al., Nature Physics (2016)