Ultrafast XUV emission from laser wakefields in underdense plasma
It is shown that a laser wakefield driven in the highly nonlinear regime or the wave-breaking regime in underdense plasma can emit ultra-broad-band bright extreme ultraviolet (XUV) radiation pulses, which are as short as a few hundreds of attoseconds in one-dimensional simulations and a few femtosec...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2012-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/14/8/083031 |
| _version_ | 1797751590258475008 |
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| author | Yue Liu Z M Sheng J Zheng F Y Li X L Xu W Lu W B Mori C S Liu J Zhang |
| author_facet | Yue Liu Z M Sheng J Zheng F Y Li X L Xu W Lu W B Mori C S Liu J Zhang |
| author_sort | Yue Liu |
| collection | DOAJ |
| description | It is shown that a laser wakefield driven in the highly nonlinear regime or the wave-breaking regime in underdense plasma can emit ultra-broad-band bright extreme ultraviolet (XUV) radiation pulses, which are as short as a few hundreds of attoseconds in one-dimensional simulations and a few femtoseconds in multi-dimensional cases. The emission is caused by a transverse current sheet co-moving with the laser pulse. This current sheet is formed by an electron density spike with trapped electrons in the wakefield with a certain transverse kinetic momentum of electrons left behind the laser pulse. This residual momentum appears when the laser pulse undergoes a strong self-modulation and subsequent pulse steepening at the front. In the multi-dimensional simulations, the XUV emission is found only near the laser axis with a much smaller spot size than the laser pulse due to its transverse ponderomotive force effects. The present scheme provides an alternative method for producing single bright ultrashort XUV pulses for ultrafast applications. |
| first_indexed | 2024-03-12T16:51:46Z |
| format | Article |
| id | doaj.art-8c567d3cb2a34b29884a7067f7834b6b |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:51:46Z |
| publishDate | 2012-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-8c567d3cb2a34b29884a7067f7834b6b2023-08-08T11:10:08ZengIOP PublishingNew Journal of Physics1367-26302012-01-0114808303110.1088/1367-2630/14/8/083031Ultrafast XUV emission from laser wakefields in underdense plasmaYue Liu0Z M Sheng1J Zheng2F Y Li3X L Xu4W Lu5W B Mori6C S Liu7J Zhang8Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University , Shanghai 200240, ChinaKey Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University , Shanghai 200240, China; Beijing National Laboratory of Condensed Matter Physics, Institute of Physics , CAS, Beijing 100190, ChinaKey Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University , Shanghai 200240, ChinaKey Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University , Shanghai 200240, ChinaDepartment of Engineering Physics, Tsinghua University , Beijing 100084, ChinaDepartment of Engineering Physics, Tsinghua University , Beijing 100084, ChinaDepartment of Physics and Astronomy, University of California , Los Angeles, CA 90095-1547, USA; Department of Electrical Engineering, University of California , Los Angeles, CA 90095-1547, USAEast-West Space Science Center, University of Maryland , College Park, MD, USAKey Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University , Shanghai 200240, China; Beijing National Laboratory of Condensed Matter Physics, Institute of Physics , CAS, Beijing 100190, ChinaIt is shown that a laser wakefield driven in the highly nonlinear regime or the wave-breaking regime in underdense plasma can emit ultra-broad-band bright extreme ultraviolet (XUV) radiation pulses, which are as short as a few hundreds of attoseconds in one-dimensional simulations and a few femtoseconds in multi-dimensional cases. The emission is caused by a transverse current sheet co-moving with the laser pulse. This current sheet is formed by an electron density spike with trapped electrons in the wakefield with a certain transverse kinetic momentum of electrons left behind the laser pulse. This residual momentum appears when the laser pulse undergoes a strong self-modulation and subsequent pulse steepening at the front. In the multi-dimensional simulations, the XUV emission is found only near the laser axis with a much smaller spot size than the laser pulse due to its transverse ponderomotive force effects. The present scheme provides an alternative method for producing single bright ultrashort XUV pulses for ultrafast applications.https://doi.org/10.1088/1367-2630/14/8/083031 |
| spellingShingle | Yue Liu Z M Sheng J Zheng F Y Li X L Xu W Lu W B Mori C S Liu J Zhang Ultrafast XUV emission from laser wakefields in underdense plasma New Journal of Physics |
| title | Ultrafast XUV emission from laser wakefields in underdense plasma |
| title_full | Ultrafast XUV emission from laser wakefields in underdense plasma |
| title_fullStr | Ultrafast XUV emission from laser wakefields in underdense plasma |
| title_full_unstemmed | Ultrafast XUV emission from laser wakefields in underdense plasma |
| title_short | Ultrafast XUV emission from laser wakefields in underdense plasma |
| title_sort | ultrafast xuv emission from laser wakefields in underdense plasma |
| url | https://doi.org/10.1088/1367-2630/14/8/083031 |
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