SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 10: Photonics I
Q 10.3: Vortrag
Montag, 6. März 2023, 17:45–18:00, E001
Tailored transverse field distributions in an enhancement resonator for high harmonic generation — •Tamila Rozibakieva1, Stephan H. Wissenberg2, Hans-Dieter Hoffmann2, Constantin L. Häfner2,3, Peter G. Thirolf1, and Johannes Weitenberg2,4 — 1Ludwig-Maximilians-Universität München LMU — 2Fraunhofer Institute for Laser Technology ILT — 3Chair for Laser Technology LLT, RWTH Aachen University — 4Max-Planck Institute of Quantum Optics MPQ
An enhancement resonator is a passive optical resonator, which is used for resonant enhancement of an optical power or intensity. Enhancement resonators are used in nonlinear processes such as high-harmonic generation (HHG), which requires high intensity (>10^13 W/cm^2) even at large repetition rates (>10 MHz). At Fraunhofer ILT, a VUV frequency comb is being set up for the excitation of the low-energy isomeric nuclear transition of 229-Thorium at LMU Munich as part of an ERC synergy project. The spectrum in the VUV frequency comb can be achieved via HHG in a Xe gas jet, in our case as the 7th harmonic of a driving laser at 1050 nm. A key challenge with enhancement resonators for HHG is the coupling of the harmonics out of the resonator. The talk will focus on an analysis of transverse modes that can be used to geometrically couple out high harmonics through a slit in a resonator mirror, for example the GH[1,0]-mode, the slit mode or a non-collinear resonator. It will be presented how a large spatial overlap with impinging Gaussian beam can be achieved for these modes. Funding: ERC Synergy project, Grant Agreement No. 856415.