论文标题
实验性观察轨迹在高阶段的远程谐波产生中长期超越
Experimental observation of trajectories beyond the long in high order harmonic generation
论文作者
论文摘要
我们通过通过直接衰减或通过chi绕激光脉冲来改变驱动激光场的峰值强度，从而在高阶谐波产生（HHG）中观察到的轨迹影响比长轨迹的影响更长。使用理论上的高斯光束模型来模拟量子路径干扰引起的空间干扰，我们表明，所测量的干扰模式不能完全由良好的短轨迹和长轨迹来解释。对于下高原谐波区域的更具分歧，离轴分量更大，影响发出的极端紫外线的方向和幅度，结构的变化最为突出，因此对于理解和控制HHG过程的基本原理非常重要。
We experimentally observe longer than long trajectory influence in high order harmonic generation (HHG) by varying the peak intensity of the driving laser field through either direct attenuation, or by chirping the laser pulse. Using a theoretical Gaussian beam model to simulate spatial interference resulting from quantum path interference we show that the measured interference patterns cannot be solely explained by the well established short and long trajectories. The structure change is most prominent for the more divergent, off-axis components of the lower plateau harmonic region, affecting the direction and amplitude of the extreme ultraviolet light emitted, and is thus of importance for understanding and controlling the fundamentals of the HHG process.
