Bright attosecond soft X-ray pulse trains by transient phase-matching in two-color high-order harmonic generation.
Bright attosecond soft X-ray pulse trains by transient phase-matching in two-color high-order harmonic generation.
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DOI：
10.1364/oe.23.033947
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发表时间：
2015-12
期刊：
影响因子：
3.8
通讯作者：
B. Schütte;P. Weber;K. Kovács;E. Balogh;B. Major;V. Tosa;Song Han;M. Vrakking;K. Varjú;A. Rouzée
中科院分区：
文献类型：
--
作者：
B. Schütte;P. Weber;K. Kovács;E. Balogh;B. Major;V. Tosa;Song Han;M. Vrakking;K. Varjú;A. Rouzée
我们研究了在790 nm和1300 nm激光驱动下的霓虹灯中的双色高次谐波产生，观察到了延伸到160 eV光子能量的极紫外连续谱。利用6 mm长的高压气体室，我们优化了高光子能量下的HHG产额，并研究了位相匹配条件下的电离和传输的影响，该条件允许我们控制XUV发射的时间结构。包括双色激光脉冲三维传输在内的数值模拟表明，在我们的实验条件下，由于高效的光学和相位匹配的混合选通机制，可以产生具有极高光子能量的明亮的孤立阿秒脉冲。
We study two-color high-order harmonic generation in Neon with 790 nm and 1300 nm driving laser fields and observe an extreme-ultraviolet continuum that extends to photon energies of 160 eV. Using a 6-mm-long, high pressure gas cell, we optimize the HHG yield at high photon energies and investigate the effect of ionization and propagation under phase-matching conditions that allow us to control the temporal structure of the XUV emission. Numerical simulations that include the 3D propagation of the two-color laser pulse show that a bright isolated attosecond pulse with exceptionally high photon energies can be generated in our experimental conditions due to an efficient hybrid optical and phase-matching gating mechanism.