Optimization of infrared two-color multicycle field synthesis for intense-isolated-attosecond-pulse generation
Optimization of infrared two-color multicycle field synthesis for intense-isolated-attosecond-pulse generation
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DOI：
10.1103/physreva.82.053413
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发表时间：
2010-11-23
影响因子：
2.9
通讯作者：
Midorikawa, Katsumi
中科院分区：
文献类型：
--
作者：
Lan, Pengfei;Takahashi, Eiji J.;Midorikawa, Katsumi
我们提出了双色合成方法的优化，用于在多周期状态下生成强隔离阿秒脉冲（IAP）。通过将红外辅助脉冲与钛蓝宝石主脉冲混合，我们表明可以使用持续时间超过 30 fs 的多周期双色脉冲产生 IAP。我们还讨论了载波包络相位 (CEP) 和相对强度对 IAP 生成的影响。通过优化辅助场的波长，IAP 的生成对 CEP 滑动变得不敏感。因此，优化的双色方法使我们能够放宽脉冲持续时间的要求，并轻松地用传统的多周期激光脉冲产生IAP。此外，它使我们能够显着抑制谐波介质的电离。这是通过应用适当的相位匹配和能量缩放技术从中性介质中有效产生强 IAP 的主要优势。
We present the optimization of the two-color synthesis method for generating an intense isolated attosecond pulse (IAP) in the multicycle regime. By mixing an infrared assistant pulse with a Ti:sapphire main pulse, we show that an IAP can be produced using a multicycle two-color pulse with a duration longer than 30 fs. We also discuss the influence of the carrier-envelope phase (CEP) and the relative intensity on the generation of IAPs. By optimizing the wavelength of the assistant field, IAP generation becomes insensitive to the CEP slip. Therefore, the optimized two-color method enables us to relax the requirements of pulse duration and easily produce the IAP with a conventional multicycle laser pulse. In addition, it enables us to markedly suppress the ionization of the harmonic medium. This is a major advantage for efficiently generating intense IAPs from a neutral medium by applying the appropriate phase-matching and energy-scaling techniques.