Yang Zhen, Cao Wei, Mo Yunlong, Xu Huiyao, Mi Kang, Lan Pengfei, Zhang Qingbin, Lu Peixiang
Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.
Natl Sci Rev. 2020 Sep 4;8(10):nwaa211. doi: 10.1093/nsr/nwaa211. eCollection 2021 Oct.
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.
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。一种类似的时域干涉测量技术将成为空间域应用的重要补充，并且需要在极短时间和极高能量尺度上对干涉进行操控。在此，我们报告一种全光干涉仪，它使用激光驱动的高次谐波作为阿秒时间狭缝。通过用外部场控制时间狭缝的相位，实现了一种既保留阿秒时间分辨率又保留数百毫电子伏特能量分辨率的时域干涉仪。我们应用这种卓越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探究氩气中靠近库珀极小值处跃迁偶极矩的异常特性。这种新型阿秒干涉测量法为使用全光方法在时间 - 能量域进行高精度测量铺平了道路。
