Interpreting attoclock measurements of tunnelling times

被引：0

作者：

Torlina L. ^{[1
]}

Morales F. ^{[1
]}

Kaushal J. ^{[1
]}

Ivanov I. ^{[2
]}

Kheifets A. ^{[2
]}

Zielinski A. ^{[3
]}

Scrinzi A. ^{[3
]}

Muller H.G. ^{[1
]}

Sukiasyan S. ^{[4
]}

Ivanov M. ^{[1
,4
,5
]}

Smirnova O. ^{[1
]}

机构：

[1] Max-Born-Institut, Max-Born-Strasse 2A, Berlin

[2] Research School of Physical Sciences, Australian National University, Canberra, 0200, ACT

[3] Ludwig Maximilians University, Theresienstrasse 37, Munich

[4] Department of Physics, Imperial College London, South Kensington Campus, London

[5] Institute für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, Berlin

来源：

Nature Physics | 2015年 / 11卷 / 6期

基金：

奥地利科学基金会; 澳大利亚研究理事会; 英国工程与自然科学研究理事会;

关键词：

D O I：

10.1038/nphys3340

中图分类号：

学科分类号：

摘要：

Resolving in time the dynamics of light absorption by atoms and molecules, and the electronic rearrangement this induces, is among the most challenging goals of attosecond spectroscopy. The attoclock is an elegant approach to this problem, which encodes ionization times in the strong-field regime. However, the accurate reconstruction of these times from experimental data presents a formidable theoretical task. Here, we solve this problem by combining analytical theory with ab initio numerical simulations. We apply our theory to numerical attoclock experiments on the hydrogen atom to extract ionization time delays and analyse their nature. Strong-field ionization is often viewed as optical tunnelling through the barrier created by the field and the core potential. We show that, in the hydrogen atom, optical tunnelling is instantaneous. We also show how calibrating the attoclock using the hydrogen atom opens the way to identifying possible delays associated with multielectron dynamics during strong-field ionization. © 2015 Macmillan Publishers Limited. All rights reserved.

引用

页码：503 / 508

页数：5

共 33 条

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