Filamentation-Assisted Isolated Attosecond Pulse Generation
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866913602641854464 |
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| author | Chien, Yu-En Fernández-Galán, Marina Tsai, Ming-Shian Liang, An-Yuan Conejero-Jarque, Enrique Serrano, Javier Román, Julio San Hernández-García, Carlos Chen, Ming-Chang |
| author_facet | Chien, Yu-En Fernández-Galán, Marina Tsai, Ming-Shian Liang, An-Yuan Conejero-Jarque, Enrique Serrano, Javier Román, Julio San Hernández-García, Carlos Chen, Ming-Chang |
| contents | Isolated attosecond pulses (IAPs) generated by few-cycle femtosecond lasers are essential for capturing ultrafast dynamics in atoms, molecules, and solids. Nonetheless, the advancement of attosecond science critically depends on achieving stable, high-temporal-contrast IAPs. Our study reveals a universal scenario in which self-compression of the infrared driver in high harmonic generation in extended gas media leads to high-contrast high-frequency IAP generation. Our experimental and theoretical results reveal that filamentation in a semi-infinite gas cell not only shapes the infrared driving pulse spatially and temporally, but also creates a stable propagation region where high harmonic generation is phase-matched, leading to the production of bright IAPs. In an argon-filled gas cell, filamentation notably reduces the pulse duration of Yb-based 1030 nm pulses from 4.7 fs to 3.5 fs, while simultaneously generating high-contrast 200-attosecond IAPs at 70 eV. We demonstrate the universality of filamentation-assisted IAP generation, showing that post-compressed Yb-based laser filaments in neon and helium yield even shorter IAPs: 69-attoseconds at 100 eV, and 65-attoseconds IAPs at 135 eV, respectively. This spatiotemporal reshaping of few-cycle pulses through filamentation possesses immediate impacts on both post-compression techniques and attosecond-based technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_06339 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Filamentation-Assisted Isolated Attosecond Pulse Generation Chien, Yu-En Fernández-Galán, Marina Tsai, Ming-Shian Liang, An-Yuan Conejero-Jarque, Enrique Serrano, Javier Román, Julio San Hernández-García, Carlos Chen, Ming-Chang Optics Applied Physics Plasma Physics Isolated attosecond pulses (IAPs) generated by few-cycle femtosecond lasers are essential for capturing ultrafast dynamics in atoms, molecules, and solids. Nonetheless, the advancement of attosecond science critically depends on achieving stable, high-temporal-contrast IAPs. Our study reveals a universal scenario in which self-compression of the infrared driver in high harmonic generation in extended gas media leads to high-contrast high-frequency IAP generation. Our experimental and theoretical results reveal that filamentation in a semi-infinite gas cell not only shapes the infrared driving pulse spatially and temporally, but also creates a stable propagation region where high harmonic generation is phase-matched, leading to the production of bright IAPs. In an argon-filled gas cell, filamentation notably reduces the pulse duration of Yb-based 1030 nm pulses from 4.7 fs to 3.5 fs, while simultaneously generating high-contrast 200-attosecond IAPs at 70 eV. We demonstrate the universality of filamentation-assisted IAP generation, showing that post-compressed Yb-based laser filaments in neon and helium yield even shorter IAPs: 69-attoseconds at 100 eV, and 65-attoseconds IAPs at 135 eV, respectively. This spatiotemporal reshaping of few-cycle pulses through filamentation possesses immediate impacts on both post-compression techniques and attosecond-based technologies. |
| title | Filamentation-Assisted Isolated Attosecond Pulse Generation |
| topic | Optics Applied Physics Plasma Physics |
| url | https://arxiv.org/abs/2412.06339 |