Signatures of the orbital angular momentum of an infrared light beam in the two-photon transition matrix element: A step toward attosecond chronoscopy of photoionization

Sucharita Giri, Misha Ivanov, and Gopal Dixit

Phys. Rev. A 101, 033412 – Published 23 March 2020

Abstract

We present a theory of time-resolved photoionization in the presence of a vortex beam. In a pump-probe setup, an extreme ultraviolet or an x-ray pump pulse triggers ionization, which is probed by a synchronized infrared pulse with nonzero orbital angular momentum. We show how this property of the probe pulse affects the electron dynamics upon ionization, in a way that is independent of the initial and final angular momentum states of the ionizing system.

Received 27 June 2019
Accepted 3 March 2020

DOI:https://doi.org/10.1103/PhysRevA.101.033412

Physics Subject Headings (PhySH)

Angular momentum of light Light-matter interaction Ultrafast phenomena

Atomic, Molecular & Optical

Authors & Affiliations

Sucharita Giri ¹, Misha Ivanov^2,3,4, and Gopal Dixit^1,*

¹Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
²Max-Born-Institut, Max Born Strasse 2A, 12489 Berlin, Germany
³Blackett Laboratory, Imperial College London, South Kensington Campus, SW7 2AZ London, United Kingdom
⁴Department of Physics, Humboldt University, Newtonstrasse 15, 12489 Berlin, Germany

^*gdixit@phy.iitb.ac.in

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Vol. 101, Iss. 3 — March 2020

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