Advanced properties of extended plasmas for efficient high-order harmonic generation
Advanced properties of extended plasmas for efficient high-order harmonic generation
复制标题
DOI：
10.1063/1.4875738
复制
发表时间：
2014-05
影响因子：
2.2
通讯作者：
R. Ganeev;M. Suzuki;H. Kuroda
中科院分区：
文献类型：
--
作者：
R. Ganeev;M. Suzuki;H. Kuroda
与之前研究中使用的短等离子体（∼0.3–0.5 mm）相比，我们展示了扩展等离子体羽流（5 mm）的先进特性，可有效产生激光辐射的谐波。随着等离子体长度的增长，谐波转换效率呈二次方增加。介绍了使用在各种金属表面上产生的长等离子体射流在整个极紫外范围内对该过程的研究，特别是包括共振增强激光频率转换和双色泵浦。通过适当调制扩展烧蚀区域的空间特性和形成分离的等离子体射流，这种等离子体可用于准相位匹配实验。
We demonstrate the advanced properties of extended plasma plumes (5 mm) for efficient harmonic generation of laser radiation compared with the short lengths of plasmas (∼0.3–0.5 mm) used in previous studies. The harmonic conversion efficiency quadratically increased with the growth of plasma length. The studies of this process along the whole extreme ultraviolet range using the long plasma jets produced on various metal surfaces, particularly including the resonance-enhanced laser frequency conversion and two-color pump, are presented. Such plasmas could be used for the quasi-phase matching experiments by proper modulation of the spatial characteristics of extended ablating area and formation of separated plasma jets.