Kübel M, Wustelt P, Zhang Y, Skruszewicz S, Hoff D, Würzler D, Kang H, Zille D, Adolph D, Paulus G G, Sayler A M, Dumergue M, Nayak A, Flender R, Haizer L, Kurucz M, Kiss B, Kühn S, Fetić B, Milošević D B
Institute of Optics and Quantum Electronics, Max-Wien-Platz 1, D-07743 Jena, Germany and Helmholtz Institute Jena, Fröbelstieg 3, D-07743 Jena, Germany.
Institute of Optics and Quantum Electronics, Max-Wien-Platz 1, D-07743 Jena, Germany, Helmholtz Institute Jena, Fröbelstieg 3, D-07743 Jena, Germany, and Benedictine College, Department of Physics and Astronomy, Atchison, Kansas 66002, USA.
Phys Rev Lett. 2021 Mar 19;126(11):113201. doi: 10.1103/PhysRevLett.126.113201.
Above-threshold ionization spectra from cesium are measured as a function of the carrier-envelope phase (CEP) using laser pulses centered at 3.1 μm wavelength. The directional asymmetry in the energy spectra of backscattered electrons oscillates three times, rather than once, as the CEP is changed from 0 to 2π. Using the improved strong-field approximation, we show that the unusual behavior arises from the interference of few quantum orbits. We discuss the conditions for observing the high-order CEP dependence, and draw an analogy with time-domain holography with electron wave packets.
利用中心波长为3.1微米的激光脉冲，测量了铯的阈上电离光谱随载波包络相位（CEP）的变化。当CEP从0变化到2π时，背散射电子能谱中的方向不对称性振荡了三次，而不是一次。使用改进的强场近似，我们表明这种异常行为源于少数量子轨道的干涉。我们讨论了观察高阶CEP依赖性的条件，并与电子波包的时域全息术进行了类比。
