Perturbed ac Stark Effect for Attosecond Optical-Waveform Sampling

作者：Kang Mi, Wei Cao, Huiyao Xu, Yunlong Mo, Zhen Yang, Pengfei Lan, Qingbin Zhang, Peixiang Lu · 发表于：Physical Review Applied · 年份：2020 · DOI：10.1103/physrevapplied.13.014032 · 被引用次数：22 · 研究领域：Laser-Matter Interactions and Applications、Advanced Fiber Laser Technologies、Mass Spectrometry Techniques and Applications

The temporal structures of ultrashort optical pulses are key to the study of ultrafast phenomena. The authors demonstrate an all-optical method for time-domain characterization of an ultrashort optical pulse. Utilizing nonionizing lasers to induce the ac Stark effect in a helium atom, by interrogating the quasienergies of the laser-dressed atom using extreme-ultraviolet attosecond pulses, the waveform of an optical pulse can be precisely diagnosed. Using a nonionizing laser minimizes plasma-induced pulse distortion, and provides a complementary detection scheme for an effective and reliable ``optical oscilloscope''.