arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2204.08698physics.plasm-phphysics.optics
收藏

利用等离子体高效产生可调谐磁光涡旋

Efficient Generation of Tunable Magnetic and Optical Vortices Using Plasmas

Yipeng Wu, Xinlu Xu, Chaojie Zhang, Zan Nie, Mitchell Sinclair, Audrey Farrell, Ken A Marsh, Jianfei Hua, Wei Lu, Warren B. Mori, Chan Joshi

摘要:

等离子体是一种有吸引力的介质,用于产生具有可预测拓扑结构的强微观磁结构和可调谐电磁辐射,这是由于其维持和操纵高电流和强场的非凡能力。在这里,使用理论和模拟,我们表明,当一个尖锐的相对论电离锋(IF)通过一个相对长波长的拉盖尔-高斯(LG)激光脉冲与轨道角动量(OAM)时,多兆高斯磁和可调光涡旋的有效生成。通过改变等离子体密度,光涡旋在很宽的光谱范围内发生频率上移,并在持续时间上被压缩。两个涡旋的拓扑电荷可以通过控制入射LG激光的OAM模式和/或通过控制IF的拓扑和密度来操纵。对于相对高(低)的等离子体密度,入射LG激光脉冲的大部分能量被转换为磁(光)涡。

英文摘要:

Plasma is an attractive medium for generating strong microscopic magnetic structures and tunable electromagnetic radiation with predictable topologies due to its extraordinary ability to sustain and manipulate high currents and strong fields. Here, using theory and simulations, we show efficient generation of multi-megagauss magnetic and tunable optical vortices when a sharp relativistic ionization front (IF) passes through a relatively long-wavelength Laguerre-Gaussian (LG) laser pulse with orbital angular momentum (OAM). The optical vortex is frequency upshifted within a wide spectral range simply by changing the plasma density and compressed in duration. The topological charges of both vortices can be manipulated by controlling the OAM mode of the incident LG laser and/or by controlling the topology and density of the IF. For relatively high (low) plasma densities, most energy of the incident LG laser pulse is converted to the magnetic (optical) vortex.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑