Opportunities for detecting ring currents using an attoclock setup

Jivesh Kaushal, Felipe Morales, and Olga Smirnova
Phys. Rev. A 92, 063405 – Published 7 December 2015

Abstract

Strong field ionization by circularly polarized laser fields from initial states with internal orbital momentum has an interesting propensity rule: electrons counter-rotating with respect to the laser field can be liberated more easily than co-rotating electrons [Barth and Smirnova, Phys. Rev. A 84, 063415 (2011)]. Here we show that application of few-cycle IR pulses allows one to use this propensity rule to detect ring currents associated with such quantum states, by observing angular shifts of the ejected electrons. Such shifts present the main observable of the attoclock method. We use time-dependent analytical R-matrix theory to show that the attoclock measured angular shifts of an electron originating from two counter-rotating orbitals (p+ and p) are noticeably different. Our work opens opportunities for detecting ring currents excited in atoms and molecules, using the attoclock setup.

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  • Received 9 October 2015

DOI:https://doi.org/10.1103/PhysRevA.92.063405

©2015 American Physical Society

Authors & Affiliations

Jivesh Kaushal*, Felipe Morales, and Olga Smirnova*

  • Max Born Institute, Max Born Strasse 2a, 12489 Berlin, Germany

  • *Corresponding authors: jivesh.kaushal@mbi-berlin.de; olga.smirnova@mbi-berlin.de

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Vol. 92, Iss. 6 — December 2015

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