Intense harmonics with time-varying orbital angular momentum from relativistic plasma mirrors
| Autor: | Wang, Jingwei, Zepf, Matt, Leng, Yuxin, Li, Ruxin, Rykovanov, Sergey G. |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Popis: | In this work using three-dimensional particle-in-cell simulations and analytical considerations we demonstrate intense high-order plasma surface harmonics carrying a time-varying orbital angular momentum (OAM) -- the self-torque. We show that by using two laser beams with different OAMs $l_1$ and $l_2$ and a certain delay between each other and shooting them obliquely on an overdense plasma target, one can generate harmonics with OAM spanning $nl_1$ to $nl_2$, where $n$ is the order of the harmonic. Such intense self-torqued harmonics can offer new possibilities in ultrafast spectroscopy. 12 pages, 4 figures |
| Databáze: | OpenAIRE |
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