Publikation: Coherent Generation and Field-Resolved Detection of Nonlinear x3 Spectral Broadening in the Multi-THz Regime
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The availability of ultrabroadband and high-intensity laser sources in the mid-infrared spectral range is of crucial importance for the research field targeting spectroscopy and ultrafast phenomena in condensed matter but remains challenging due to the lack of conventional gain media and sensitive detectors. Although the energetic conversion from the near to the mid infrared via difference-frequency generation (DFG) in nonlinear crystals is widely exploited, general considerations of phase matching reveal a conflict: in the first approximation, a trade-off between the efficiency and the acceptance bandwidth of the DFG process is unavoidable. While the former increases exponentially with the length of the nonlinear medium, the bandwidth decreases rapidly with the inverse square root owing to the finite mismatch of group velocities [1]. In this work, we deal with this conflict by efficiently generating narrowband multi-THz transients with peak electric field strengths exceeding 100 MV/cm in a first step and subsequently compressing these pulses by supercontinuum generation in solids such as alkali halides (NaCl, KBr, CsI) and semiconductors (ZnSe, KRS-5).
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SCHÖNFELD, Christoph, Alexander-Cornelius HEINRICH, Alessandro BASERGA, Davide BOSSINI, Lennart FEUERER, Alfred LEITENSTORFER, 2023. Coherent Generation and Field-Resolved Detection of Nonlinear x3 Spectral Broadening in the Multi-THz Regime. 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). Munich, Germany, 26. Juni 2023 - 30. Juni 2023. In: 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). New York: IEEE, 2023, 23690131. ISSN 2639-5452. eISSN 2833-1052. ISBN 979-8-3503-4600-8. Available under: doi: 10.1109/cleo/europe-eqec57999.2023.10231674BibTex
@inproceedings{Schonfeld2023-06-26Coher-68483, year={2023}, doi={10.1109/cleo/europe-eqec57999.2023.10231674}, title={Coherent Generation and Field-Resolved Detection of Nonlinear x<sup>3</sup> Spectral Broadening in the Multi-THz Regime}, isbn={979-8-3503-4600-8}, issn={2639-5452}, publisher={IEEE}, address={New York}, booktitle={2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)}, author={Schönfeld, Christoph and Heinrich, Alexander-Cornelius and Baserga, Alessandro and Bossini, Davide and Feuerer, Lennart and Leitenstorfer, Alfred}, note={Article Number: 23690131} }
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