Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 22: Posters: Quantum Optics and Photonics II
Q 22.11: Poster
Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof
Cross-Phase Modulation Artifacts in Femtosecond Stimulated Raman Scattering — •Thomas Würthwein1, Niklas M. Lüpken1, and Carsten Fallnich1,2 — 1Institute of Applied Physics, University of Münster, Corrensstraße 2, 48149 Münster, Germany — 2MESA+ Institute for Nanotechnology, University of Twente, Enschede 7500 AE, The Netherlands
Coherent Raman scattering techniques, such as femtosecond stimulated Raman scattering (FSRS), show a great potential for a number of applications due to an enhanced signal-strength in comparison to spontaneous Raman scattering. FSRS is free of a non-resonant background but is affected by two-photon absorption as well as cross-phase modulation (XPM) and temperature-induced refractive index changes. The resulting artifacts in SRS become relevant for high pulse energies and ultrashort pulses, necessary for super-resolution experiments. Here, we present a systematic study in order to investigate the influences of XPM on FSRS in the regime of high pulse energies by varying the most crucial parameters for XPM, namely the pulse duration, the temporal overlap, the peak intensity, and the nonlinear refractive index of the sample.