Bright Coherent Ultrahigh Harmonics in the keV X-Ray Regime from Mid-Infrared Femtosecond Lasers
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2024
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| author | Popmintchev, Tenio Chen, Ming-Chang Popmintchev, Dimitar Arpin, Paul Brown, Susannah Ališauskas, Skirmantas Andriukaitis, Giedrius Balčiunas, Tadas Mücke, Oliver Pugzlys, Audrius Baltuška, Andrius Shim, Bonggu Schrauth, Samuel E. Gaeta, Alexander Hernández-García, Carlos Plaja, Luis Becker, Andreas Jaron-Becker, Agnieszka Murnane, Margaret M. Kapteyn, Henry C. |
| author_facet | Popmintchev, Tenio Chen, Ming-Chang Popmintchev, Dimitar Arpin, Paul Brown, Susannah Ališauskas, Skirmantas Andriukaitis, Giedrius Balčiunas, Tadas Mücke, Oliver Pugzlys, Audrius Baltuška, Andrius Shim, Bonggu Schrauth, Samuel E. Gaeta, Alexander Hernández-García, Carlos Plaja, Luis Becker, Andreas Jaron-Becker, Agnieszka Murnane, Margaret M. Kapteyn, Henry C. |
| contents | High harmonic generation traditionally combines ~100 near-infrared laser photons, to generate bright, phase matched, extreme ultraviolet beams when the emission from many atoms adds constructively. Here we show that by guiding a mid-infrared femtosecond laser in a high pressure gas, ultrahigh harmonics can be generated up to orders > 5000, that emerge as a bright supercontinuum that spans the entire electromagnetic spectrum from the ultraviolet to > 1.6 keV, allowing in-principle the generation of pulses as short as 2.5 attoseconds. The multi-atmosphere gas pressures required for bright, phase matched emission also supports laser beam self-confinement, further enhancing the x-ray yield. Finally, the x-ray beam exhibits high spatial coherence, even though at high gas density, the recolliding electrons responsible for high harmonic generation encounter other atoms during the emission process. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_19535 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Bright Coherent Ultrahigh Harmonics in the keV X-Ray Regime from Mid-Infrared Femtosecond Lasers Popmintchev, Tenio Chen, Ming-Chang Popmintchev, Dimitar Arpin, Paul Brown, Susannah Ališauskas, Skirmantas Andriukaitis, Giedrius Balčiunas, Tadas Mücke, Oliver Pugzlys, Audrius Baltuška, Andrius Shim, Bonggu Schrauth, Samuel E. Gaeta, Alexander Hernández-García, Carlos Plaja, Luis Becker, Andreas Jaron-Becker, Agnieszka Murnane, Margaret M. Kapteyn, Henry C. Optics Atomic Physics Quantum Physics High harmonic generation traditionally combines ~100 near-infrared laser photons, to generate bright, phase matched, extreme ultraviolet beams when the emission from many atoms adds constructively. Here we show that by guiding a mid-infrared femtosecond laser in a high pressure gas, ultrahigh harmonics can be generated up to orders > 5000, that emerge as a bright supercontinuum that spans the entire electromagnetic spectrum from the ultraviolet to > 1.6 keV, allowing in-principle the generation of pulses as short as 2.5 attoseconds. The multi-atmosphere gas pressures required for bright, phase matched emission also supports laser beam self-confinement, further enhancing the x-ray yield. Finally, the x-ray beam exhibits high spatial coherence, even though at high gas density, the recolliding electrons responsible for high harmonic generation encounter other atoms during the emission process. |
| title | Bright Coherent Ultrahigh Harmonics in the keV X-Ray Regime from Mid-Infrared Femtosecond Lasers |
| topic | Optics Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2403.19535 |