Abstract

Interferometry, a key technique in modern precision measurements, has been used for length measurement in engineering metrology and astronomy. An analogous time-domain interferometric technique would represent a significant complement to spatial domain applications and require the manipulation of interference on extreme time and energy scales. Here, we report an all-optical interferometer using laser-driven high order harmonics as attosecond temporal slits. By controlling the phase of the temporal slits with an external field, a time domain interferometer that preserves both attosecond temporal resolution and hundreds of meV energy resolution is implemented. We apply this exceptional temporal resolution to reconstruct the waveform of an arbitrarily polarized optical pulse, and utilize the provided energy resolution to interrogate the abnormal character of the transition dipole near the Cooper minimum in argon. This novel attosecond interferometry paves the way for high precision measurements in the time-energy domain using all-optical approaches.

中文翻译：

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全光阿秒时域干涉仪

摘要

干涉测量法是现代精密测量中的一项关键技术，已被用于工程计量学和天文学中的长度测量。类似的时域干涉测量技术将代表对空间域应用的重要补充，并且需要在极端时间和能量尺度上处理干扰。在这里，我们报告了一种使用激光驱动的高次谐波作为阿秒时间狭缝的全光学干涉仪。通过用外场控制时间狭缝的相位，实现了同时保留阿秒时间分辨率和数百 meV 能量分辨率的时域干涉仪。我们应用这种特殊的时间分辨率来重建任意偏振光脉冲的波形，并利用所提供的能量分辨率来询问氩气中库珀最小值附近跃迁偶极子的异常特征。这种新颖的阿秒干涉测量法为使用全光学方法在时能域中进行高精度测量铺平了道路。