Dramatic Enhancement of Supercontinuum Generation in H$_2$O by Non-Harmonic Two-Color Excitation
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866909740486885376 |
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| author | Kanai, Tsuneto Jin, ChengXiang Tsunekawa, Hibiki Sakurai, Atsunori Sugimoto, Toshiki |
| author_facet | Kanai, Tsuneto Jin, ChengXiang Tsunekawa, Hibiki Sakurai, Atsunori Sugimoto, Toshiki |
| contents | We demonstrate a dramatic enhancement of supercontinuum generation (SCG) in H$_2$O driven by non-harmonic two-color laser fields, where pump and seed frequencies are not integer multiples. This scheme yields a broadband SC spectrum enhanced by approximately three orders of magnitude over the single-color case. Systematic experiments and theoretical analysis, including isotope effects, show that the enhancement arises from soliton compression with resonant dispersive wave (RDW) emission, phase- and group-velocity-matched four-wave mixing (FWM), and cross-phase modulation (XPM), offering a versatile route to stronger SCG and noise suppression in broadband spectroscopy in H$_2$O, an emerging topic in attosecond and surface physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_12765 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dramatic Enhancement of Supercontinuum Generation in H$_2$O by Non-Harmonic Two-Color Excitation Kanai, Tsuneto Jin, ChengXiang Tsunekawa, Hibiki Sakurai, Atsunori Sugimoto, Toshiki Optics Applied Physics Chemical Physics We demonstrate a dramatic enhancement of supercontinuum generation (SCG) in H$_2$O driven by non-harmonic two-color laser fields, where pump and seed frequencies are not integer multiples. This scheme yields a broadband SC spectrum enhanced by approximately three orders of magnitude over the single-color case. Systematic experiments and theoretical analysis, including isotope effects, show that the enhancement arises from soliton compression with resonant dispersive wave (RDW) emission, phase- and group-velocity-matched four-wave mixing (FWM), and cross-phase modulation (XPM), offering a versatile route to stronger SCG and noise suppression in broadband spectroscopy in H$_2$O, an emerging topic in attosecond and surface physics. |
| title | Dramatic Enhancement of Supercontinuum Generation in H$_2$O by Non-Harmonic Two-Color Excitation |
| topic | Optics Applied Physics Chemical Physics |
| url | https://arxiv.org/abs/2508.12765 |