Resonant propagation of extreme-ultraviolet pulses through strongly driven high-density media
We show that by combining strong-field dressing and resonant propagation of XUV pulses, the transition of absorption lines from their natural Lorentzian profiles through Fano and complex multipeak shapes all the way back to broadened near-Lorentzian profiles can be achieved, in the limit of opticall...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-04-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.7.023064 |
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| author | Yu He Shuyuan Hu Gergana D. Borisova Yizhu Zhang Marc Rebholz Zuoye Liu Mette B. Gaarde Christian Ott Thomas Pfeifer |
| author_facet | Yu He Shuyuan Hu Gergana D. Borisova Yizhu Zhang Marc Rebholz Zuoye Liu Mette B. Gaarde Christian Ott Thomas Pfeifer |
| author_sort | Yu He |
| collection | DOAJ |
| description | We show that by combining strong-field dressing and resonant propagation of XUV pulses, the transition of absorption lines from their natural Lorentzian profiles through Fano and complex multipeak shapes all the way back to broadened near-Lorentzian profiles can be achieved, in the limit of optically thick samples. The final stage of this spectral modification can be understood in terms of a significant temporal stretching and delay of the resonant XUV pulse as it propagates through the dense gas, which alters the ultrafast absorption that is modified by the time-synchronized few-femtosecond laser pulse. We first demonstrate this concept in numerical calculations, both using a model system and through a fully coupled solution of the time-dependent Schrödinger equation and the Maxwell wave equation. The applicability and generality of the underlying mechanism is then illustrated in proof-of-principle attosecond transient absorption measurements in a helium gas with a widely varying atomic density. These results provide insights into the interaction of ultrashort laser pulses with dense media and its coherent control. |
| format | Article |
| id | doaj-art-645b499d0bd54327967e33ab4fb9ffd0 |
| institution | OA Journals |
| issn | 2643-1564 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-645b499d0bd54327967e33ab4fb9ffd02025-08-20T02:27:33ZengAmerican Physical SocietyPhysical Review Research2643-15642025-04-017202306410.1103/PhysRevResearch.7.023064Resonant propagation of extreme-ultraviolet pulses through strongly driven high-density mediaYu HeShuyuan HuGergana D. BorisovaYizhu ZhangMarc RebholzZuoye LiuMette B. GaardeChristian OttThomas PfeiferWe show that by combining strong-field dressing and resonant propagation of XUV pulses, the transition of absorption lines from their natural Lorentzian profiles through Fano and complex multipeak shapes all the way back to broadened near-Lorentzian profiles can be achieved, in the limit of optically thick samples. The final stage of this spectral modification can be understood in terms of a significant temporal stretching and delay of the resonant XUV pulse as it propagates through the dense gas, which alters the ultrafast absorption that is modified by the time-synchronized few-femtosecond laser pulse. We first demonstrate this concept in numerical calculations, both using a model system and through a fully coupled solution of the time-dependent Schrödinger equation and the Maxwell wave equation. The applicability and generality of the underlying mechanism is then illustrated in proof-of-principle attosecond transient absorption measurements in a helium gas with a widely varying atomic density. These results provide insights into the interaction of ultrashort laser pulses with dense media and its coherent control.http://doi.org/10.1103/PhysRevResearch.7.023064 |
| spellingShingle | Yu He Shuyuan Hu Gergana D. Borisova Yizhu Zhang Marc Rebholz Zuoye Liu Mette B. Gaarde Christian Ott Thomas Pfeifer Resonant propagation of extreme-ultraviolet pulses through strongly driven high-density media Physical Review Research |
| title | Resonant propagation of extreme-ultraviolet pulses through strongly driven high-density media |
| title_full | Resonant propagation of extreme-ultraviolet pulses through strongly driven high-density media |
| title_fullStr | Resonant propagation of extreme-ultraviolet pulses through strongly driven high-density media |
| title_full_unstemmed | Resonant propagation of extreme-ultraviolet pulses through strongly driven high-density media |
| title_short | Resonant propagation of extreme-ultraviolet pulses through strongly driven high-density media |
| title_sort | resonant propagation of extreme ultraviolet pulses through strongly driven high density media |
| url | http://doi.org/10.1103/PhysRevResearch.7.023064 |
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