Controlling the Bandwidth of High Harmonic Emission Peaks with the Spectral Polarization of the Driver
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866913240728993792 |
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| author | Ragonis, Eldar Arosh, Eran Ben Merensky, Lev Fleischer, Avner |
| author_facet | Ragonis, Eldar Arosh, Eran Ben Merensky, Lev Fleischer, Avner |
| contents | We demonstrate a High-Harmonic-Generation scheme which offers control over the bandwidth of the spectral peaks. The scheme uses a vectorial two-color driver with close central frequencies, generated by spectrally splitting a linearly-polarized input femtosecond-duration laser pulse and subsequent recombining the two halves after their polarizations are made cross-elliptical and counter-rotating. This results in the generation of new emission channels which coalesce into broad odd-integer HHG peaks, the bandwidth of each being proportional to the frequency difference between the two colors, to the harmonic order and inversely-proportional to the driver fields' ellipticities. Peak-broadening to the extent that a supercontinuum is formed is also demonstrated. This source will find use in HHG applications benefiting from high-flux broadband extreme ultra-violet radiation, such as attosecond transient absorption spectroscopy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_00443 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Controlling the Bandwidth of High Harmonic Emission Peaks with the Spectral Polarization of the Driver Ragonis, Eldar Arosh, Eran Ben Merensky, Lev Fleischer, Avner Optics We demonstrate a High-Harmonic-Generation scheme which offers control over the bandwidth of the spectral peaks. The scheme uses a vectorial two-color driver with close central frequencies, generated by spectrally splitting a linearly-polarized input femtosecond-duration laser pulse and subsequent recombining the two halves after their polarizations are made cross-elliptical and counter-rotating. This results in the generation of new emission channels which coalesce into broad odd-integer HHG peaks, the bandwidth of each being proportional to the frequency difference between the two colors, to the harmonic order and inversely-proportional to the driver fields' ellipticities. Peak-broadening to the extent that a supercontinuum is formed is also demonstrated. This source will find use in HHG applications benefiting from high-flux broadband extreme ultra-violet radiation, such as attosecond transient absorption spectroscopy. |
| title | Controlling the Bandwidth of High Harmonic Emission Peaks with the Spectral Polarization of the Driver |
| topic | Optics |
| url | https://arxiv.org/abs/2307.00443 |