Towards intense single-digit attosecond pulses with a 100-mJ-class mid-infrared sub-cycle laser
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866912679186137088 |
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| author | Nishimiya, Kaito Rajpoot, Rambabu Takahashi, Eiji J |
| author_facet | Nishimiya, Kaito Rajpoot, Rambabu Takahashi, Eiji J |
| contents | The duration of isolated attosecond pulses created via high-order harmonic generation is determined by the number of optical cycles in the driving laser. Achieving shorter attosecond soft X-ray pulses requires minimizing the number of cycles while maintaining a high pulse energy. Here, we demonstrate a carrier-envelope-phase-stable, 100-mJ-class sub-cycle mid-infrared laser that produces a supercontinuum coherent soft X-ray with unprecedented bandwidth. The system delivers 50-mJ, 6.7-fs (0.88-cycle) pulses at a center wavelength of 2.26 $μ$m - over two orders of magnitude more energetic than any previous sub-cycle laser. We applied the system to high-order harmonic generation and compared the results to simulations based on the three-dimensional time-dependent Schrödinger equation to identify unique features of sub-cycle lasers. This work represents a decisive step toward high-energy half-cycle lasers and high-energy single-digit attosecond soft X-ray pulses that can be used to probe matter and light-matter interactions at previously inaccessible temporal resolutions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_27096 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Towards intense single-digit attosecond pulses with a 100-mJ-class mid-infrared sub-cycle laser Nishimiya, Kaito Rajpoot, Rambabu Takahashi, Eiji J Optics Applied Physics Atomic and Molecular Clusters The duration of isolated attosecond pulses created via high-order harmonic generation is determined by the number of optical cycles in the driving laser. Achieving shorter attosecond soft X-ray pulses requires minimizing the number of cycles while maintaining a high pulse energy. Here, we demonstrate a carrier-envelope-phase-stable, 100-mJ-class sub-cycle mid-infrared laser that produces a supercontinuum coherent soft X-ray with unprecedented bandwidth. The system delivers 50-mJ, 6.7-fs (0.88-cycle) pulses at a center wavelength of 2.26 $μ$m - over two orders of magnitude more energetic than any previous sub-cycle laser. We applied the system to high-order harmonic generation and compared the results to simulations based on the three-dimensional time-dependent Schrödinger equation to identify unique features of sub-cycle lasers. This work represents a decisive step toward high-energy half-cycle lasers and high-energy single-digit attosecond soft X-ray pulses that can be used to probe matter and light-matter interactions at previously inaccessible temporal resolutions. |
| title | Towards intense single-digit attosecond pulses with a 100-mJ-class mid-infrared sub-cycle laser |
| topic | Optics Applied Physics Atomic and Molecular Clusters |
| url | https://arxiv.org/abs/2510.27096 |