Enhancing the efficiency of high-order harmonics with two-color non-collinear wave mixing in silica

Sylvianne D. C. Roscam Abbing, Nataliia Kuzkova, Roy Linden, Filippo Campi, Brian Keijzer, Corentin Morice, Zhuang-Yan Zhang, Maarten L. S. Geest and Peter M. Kraus ()
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Sylvianne D. C. Roscam Abbing: Advanced Research Center for Nanolithography
Nataliia Kuzkova: Advanced Research Center for Nanolithography
Roy Linden: Advanced Research Center for Nanolithography
Filippo Campi: Advanced Research Center for Nanolithography
Brian Keijzer: Advanced Research Center for Nanolithography
Corentin Morice: University of Amsterdam
Zhuang-Yan Zhang: Advanced Research Center for Nanolithography
Maarten L. S. Geest: Advanced Research Center for Nanolithography
Peter M. Kraus: Advanced Research Center for Nanolithography

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract The emission of high-order harmonics from solids under intense laser-pulse irradiation is revolutionizing our understanding of strong-field solid-light interactions, while simultaneously opening avenues towards novel, all-solid, coherent, short-wavelength table-top sources with tailored emission profiles and nanoscale light-field control. To date, broadband spectra in solids have been generated well into the extreme-ultraviolet (XUV), but the comparatively low conversion efficiency in the XUV range achieved under optimal conditions still lags behind gas-based high-harmonic generation (HHG) sources. Here, we demonstrate that two-color high-order harmonic wave mixing in a fused silica solid is more efficient than solid HHG driven by a single color. This finding has significant implications for compact XUV sources where gas-based HHG is not feasible, as solid XUV wave mixing surpasses solid-HHG in performance. Moreover, our results enable utilizing solid high-order harmonic wave mixing as a probe of structure or material dynamics of the generating solid, which will enable reducing measurement times compared to the less efficient regular solid HHG. The emission intensity scaling that follows perturbative optical wave mixing, combined with the angular separation of the emitted frequencies, makes our approach a decisive step for all-solid coherent XUV sources and for studying light-engineered materials.

Date: 2024
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DOI: 10.1038/s41467-024-52774-9

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