Spectral control of high harmonics from relativistic plasmas using bicircular fields
Spectral control of high harmonics from relativistic plasmas using bicircular fields
复制标题
使用双圆场对相对论等离子体高次谐波进行光谱控制
DOI：
10.1103/physreve.97.043202
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发表时间：
2018
影响因子：
2.4
通讯作者：
Chen Zi Yu
中科院分区：
文献类型：
--
作者：
Chen Zi Yu
介绍了利用双色反转圆偏振激光场对相对论等离子体镜产生的高次谐波进行光谱控制的方法。通过粒子模拟，我们表明，只有一组选定的谐波订单可以出现由于对称性的激光场和相关的守恒定律。通过调节两个驱动场分量的强度比，我们证明了整体HHG效率，允许相邻谐波阶数的相对强度，以及谐波源的偏振状态可以调谐。该方案的高次谐波效率可以与线偏振激光场驱动的高次谐波效率一样高。
We introduce two-color counterrotating circularly polarized laser fields as a way to spectrally control high harmonic generation (HHG) from relativistic plasma mirrors. Through particle-in-cell simulations, we show that only a selected group of harmonic orders can appear owing to the symmetry of the laser fields and the related conservation laws. By adjusting the intensity ratio of the two driving field components, we demonstrate the overall HHG efficiency, the relative intensity of allowed neighboring harmonic orders, and that the polarization state of the harmonic source can be tuned. The HHG efficiency of this scheme can be as high as that driven by a linearly polarized laser field.