论文标题
通过抽水离子化门控产生亚周期的脉冲脉冲
Generation of subcycle isolated attosecond pulses by pumping ionizing gating
论文作者
论文摘要
我们提出了一种新的方法，称为泵送电离门控（PIG），用于生成孤立的Attsond脉冲（IAP）。在此制度中，短激光器用于电离预先存在的气光光栅，从而产生一个快速延伸的等离子体光栅（FEPG），其电离前方以光速传播。然后，只有在满足谐振反射的布拉格条件的情况下，低强度的长度反向泵脉冲会反射出非常狭窄的电离锋区域。因此，泵的反射限制在称为猪的亚周期区域内，并形成宽带相干IAP，并结合由于血浆梯度而引起的频率上转换效应。这种方法产生了一种新的方案，从而从巨秒泵脉冲中生成IAP。三维（3D）模拟表明，1.6-PS，1-μm泵脉冲可用于生成330，作为激光脉冲，峰强度约为泵的33倍，而转换效率约为0.1％。这些结果强调了这些猪的潜力，其潜在的具有高转化效率和峰值强度的IAP的潜力。
We present a novel approach named as pumping ionizing gating (PIG) for the generation of isolated attosecond pulses (IAPs). In this regime, a short laser is used to ionize a pre-existing gas grating, creating a fast-extending plasma grating(FEPG) having an ionization front propagating with the velocity of light. A low-intensity long counterpropagating pump pulse is then reflected by a very narrow region of the ionization front, only where the Bragg conditions for resonant reflection is satisfied. Consequently, the pump reflection is confined within a sub-cycle region called PIG, and forms a wide-band coherent IAP in combination with the frequency up-conversion effect due to the plasma gradient. This approach results in a new scheme to generate IAPs fromlong picosecond pump pulses. Three-dimensional (3D) simulations show that a 1.6-ps, 1-μm pump pulse can be used to generate a 330 as laser pulse with a peak intensity approximately 33 times that of the pump and a conversion efficiency of around 0.1%.These results highlight the potential of the PIG method for generating IAPs with high conversion efficiency and peak intensity.
