Highly efficient XUV generation via high-order frequency mixing
The efficient generation of the coherent XUV light via frequency conversion of intense laser drivers is a problem of both fundamental and technological importance. Increasing the intensity of the generated high harmonics by raising the intensity of the driving field works only up to a point: at high...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2020-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/abae89 |
| _version_ | 1797750361249808384 |
|---|---|
| author | M A Khokhlova V V Strelkov |
| author_facet | M A Khokhlova V V Strelkov |
| author_sort | M A Khokhlova |
| collection | DOAJ |
| description | The efficient generation of the coherent XUV light via frequency conversion of intense laser drivers is a problem of both fundamental and technological importance. Increasing the intensity of the generated high harmonics by raising the intensity of the driving field works only up to a point: at high intensities, rapid ionisation of the medium limits the conversion efficiency. Considering the combined effect of the phase-matching and of the blue shift of the driving field during its propagation in a rapidly ionising medium, we show that the latter can be the dominant limiting mechanism. We introduce a new spatial scale, the blue-shift length, which sets the upper bound for the quadratic intensity growth of the generated harmonics. Moreover, we show that this seemingly fundamental restriction can be overcome by using an additional generating weak mid-IR field. For specific combinations of frequencies of the generating fields, the corresponding high-order frequency-mixing process does not suffer from the blue shift of the drivers and phase mismatch, and thus its efficiency grows quadratically with propagation distance. Our results thus open a new route for highly efficient generation of coherent XUV light. |
| first_indexed | 2024-03-12T16:31:41Z |
| format | Article |
| id | doaj.art-9734287a845c4479b3befc82662f0b73 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:31:41Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-9734287a845c4479b3befc82662f0b732023-08-08T15:28:30ZengIOP PublishingNew Journal of Physics1367-26302020-01-0122909303010.1088/1367-2630/abae89Highly efficient XUV generation via high-order frequency mixingM A Khokhlova0https://orcid.org/0000-0002-5687-487XV V Strelkov1https://orcid.org/0000-0002-8565-6978Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy , Max-Born-Straße 2A, Berlin 12489, Germany; Prokhorov General Physics Institute of the Russian Academy of Sciences , Vavilova street 38, Moscow 119991, RussiaProkhorov General Physics Institute of the Russian Academy of Sciences , Vavilova street 38, Moscow 119991, Russia; Moscow Institute of Physics and Technology (State University) , Dolgoprudny, Moscow Region 141700, RussiaThe efficient generation of the coherent XUV light via frequency conversion of intense laser drivers is a problem of both fundamental and technological importance. Increasing the intensity of the generated high harmonics by raising the intensity of the driving field works only up to a point: at high intensities, rapid ionisation of the medium limits the conversion efficiency. Considering the combined effect of the phase-matching and of the blue shift of the driving field during its propagation in a rapidly ionising medium, we show that the latter can be the dominant limiting mechanism. We introduce a new spatial scale, the blue-shift length, which sets the upper bound for the quadratic intensity growth of the generated harmonics. Moreover, we show that this seemingly fundamental restriction can be overcome by using an additional generating weak mid-IR field. For specific combinations of frequencies of the generating fields, the corresponding high-order frequency-mixing process does not suffer from the blue shift of the drivers and phase mismatch, and thus its efficiency grows quadratically with propagation distance. Our results thus open a new route for highly efficient generation of coherent XUV light.https://doi.org/10.1088/1367-2630/abae89high-order harmonic generationhigh-order frequency mixingphase matchingblue shiftXUV generation |
| spellingShingle | M A Khokhlova V V Strelkov Highly efficient XUV generation via high-order frequency mixing New Journal of Physics high-order harmonic generation high-order frequency mixing phase matching blue shift XUV generation |
| title | Highly efficient XUV generation via high-order frequency mixing |
| title_full | Highly efficient XUV generation via high-order frequency mixing |
| title_fullStr | Highly efficient XUV generation via high-order frequency mixing |
| title_full_unstemmed | Highly efficient XUV generation via high-order frequency mixing |
| title_short | Highly efficient XUV generation via high-order frequency mixing |
| title_sort | highly efficient xuv generation via high order frequency mixing |
| topic | high-order harmonic generation high-order frequency mixing phase matching blue shift XUV generation |
| url | https://doi.org/10.1088/1367-2630/abae89 |
| work_keys_str_mv | AT makhokhlova highlyefficientxuvgenerationviahighorderfrequencymixing AT vvstrelkov highlyefficientxuvgenerationviahighorderfrequencymixing |