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arXiv · 2102.06873

High-order phase-dependent asymmetry in the above-threshold ionization plateau

M. Kübel·P. Wustelt·Y. Zhang·S. Skruszewicz·D. Hoff·D. Würzler·H. Kang·D. Zille·D. Adolph·A. M. Sayler·G. G. Paulus·M. Dumergue·A. Nayak·R. Flender·L. Haizer·M. Kurucz·B. Kiss·S. Kühn·B. Fetić·D. B. Milošević
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Abstract

Above-threshold ionization spectra from cesium are measured as a function of the carrier-envelope phase (CEP) using laser pulses centered at 3.1 $\mu$m 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 $2\pi$. 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.

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M. Kübel, P. Wustelt, Y. Zhang, S. Skruszewicz, D. Hoff, D. Würzler, H. Kang, D. Zille, D. Adolph, A. M. Sayler, G. G. Paulus, M. Dumergue, A. Nayak, R. Flender, L. Haizer, M. Kurucz, B. Kiss, S. Kühn, B. Fetić, D. B. Milošević. 2021-02-13. High-order phase-dependent asymmetry in the above-threshold ionization plateau. https://doi.org/10.1103/physrevlett.126.113201

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