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arXiv · 1707.07636

Disentangling intra-cycle interferences in photoelectron momentum distributions using orthogonal two-colour laser fields

Xinhua Xie·Tian Wang·ShaoGang Yu·XuanYang Lai·Stefan Roither·Daniil Kartashov·Andrius Baltuška·XiaoJun Liu·André Staudte·Markus Kitzler
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Abstract

We use orthogonally polarized two-colour (OTC) laser pulses to separate quantum paths in multiphoton ionization of Ar atoms. Our OTC pulses consist of 400~nm and 800~nm light at a relative intensity ratio of 10:1. We find a hitherto unobserved interference in the photoelectron momentum distribution, which exhibits a strong dependence on the relative phase of the OTC pulse. Analysis of model calculations reveal that the interference is caused by quantum pathways from non-adjacent quarter cycles.

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Xinhua Xie, Tian Wang, ShaoGang Yu, XuanYang Lai, Stefan Roither, Daniil Kartashov, Andrius Baltuška, XiaoJun Liu, André Staudte, Markus Kitzler. 2017-07-24. Disentangling intra-cycle interferences in photoelectron momentum distributions using orthogonal two-colour laser fields. https://doi.org/10.1103/physrevlett.119.243201

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