论文标题
用脉冲式泵进行刺激的 - 拉曼散射放大XUV脉冲，并应用于局部深入的血浆密度测量
Stimulated-Raman-scattering amplification of attosecond XUV pulses with pulse-train pumps and application to local in-depth plasma-density measurement
论文作者
论文摘要
我们提出了一种通过脉冲训练泵的刺激的拉曼散射来扩增极端脱甲虫（XUV）种子隔离的脉冲的方案。在足够的种子和泵强度下，扩增是非线性的，种子脉冲的幅度可以到达泵的振幅，比初始种子幅度高一个数量级。在线性放大方案中，我们发现泵脉冲序列的光谱特征印在放大种子脉冲的光谱上。由于光谱签名被等离子体频率降低其频率降低，因此可以推断相互作用区域中的电子密度。该区域可以纵向尺寸为微米长度。通过改变种子和泵之间的延迟，该方案提供了固体密度等离子体内部局部电子密度测量，该测量无法以光学频率探测，并以微米分辨率进行探测。
We present a scheme for amplifying an extreme-ultraviolet (XUV) seed isolated attosecond pulse via stimulated Raman scattering of a pulse-train pump. At sufficient seed and pump intensity, the amplification is nonlinear, and the amplitude of the seed pulse can reach that of the pump, one order of magnitude higher than the initial seed amplitude. In the linear amplification regime, we find that the spectral signature of the pump pulse train is imprinted on the spectrum of the amplified seed pulse. Since the spectral signature is imprinted with its frequency downshifted by the plasma frequency, it is possible to deduce the electron density in the region of interaction. This region can be of micrometer length scale longitudinally. By varying the delay between the seed and the pump, this scheme provides a local electron-density measurement inside solid-density plasmas that cannot be probed with optical frequencies, with micrometer resolution.
