Bocoum Maïmouna, Thévenet Maxence, Böhle Frederik, Beaurepaire Benoît, Vernier Aline, Jullien Aurélie, Faure Jérôme, Lopez-Martens Rodrigo
Laboratoire d'Optique Appliquée, ENSTA ParisTech, CNRS, Ecole polytechnique, Université Paris-Saclay, 828 bd des Maréchaux, 91762 Palaiseau cedex, France.
Phys Rev Lett. 2016 May 6;116(18):185001. doi: 10.1103/PhysRevLett.116.185001. Epub 2016 May 5.
We report for the first time on the anticorrelated emission of high-order harmonics and energetic electron beams from a solid-density plasma with a sharp vacuum interface-plasma mirror-driven by an intense ultrashort laser pulse. We highlight the key role played by the nanoscale structure of the plasma surface during the interaction by measuring the spatial and spectral properties of harmonics and electron beams emitted by a plasma mirror. We show that the nanoscale behavior of the plasma mirror can be controlled by tuning the scale length of the electron density gradient, which is measured in situ using spatial-domain interferometry.
我们首次报道了在由强超短激光脉冲驱动的具有尖锐真空界面的固体密度等离子体镜（plasma mirror）中，高次谐波与高能电子束的反相关发射。通过测量等离子体镜发射的谐波和电子束的空间和光谱特性，我们突出了等离子体表面纳米尺度结构在相互作用过程中所起的关键作用。我们表明，等离子体镜的纳米尺度行为可以通过调整电子密度梯度的标度长度来控制，该标度长度是使用空间域干涉测量法原位测量的。
