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Title: Strong-field ionization with two-color circularly polarized laser fields

Journal Article · · Physical Review A - Atomic, Molecular, and Optical Physics
 [1];  [1];  [1];  [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1];  [1];  [4];  [5];  [2];  [1];  [1]
  1. Univ. of Colorado and NIST, Boulder, CO (United States)
  2. Technion-Israel Institute of Technology, Haifa (Israel)
  3. Univ. of Tsukuba (Japan)
  4. National Tsing Hua Univ., Hsinchu (Taiwan)
  5. Technion-Israel Institute of Technology, Haifa (Israel); Ort Braude College, Karmiel (Israel)

Strong-field ionization provides fundamental insight into light-matter interactions, encoding the structure of atoms and molecules on the subångström and subfemtosecond scales. Here, we explore an important regime: strong-field ionization by two-color circularly polarized laser fields. In contrast to past work using linearly polarized drivers, we probe electron trajectories that are driven in a two-dimensional plane, thus separating the tunneling angle from the rescattering angle. This allows us to make several findings. First, we observe a single-lobed electron distribution for co-rotating fields, and a three-lobed distribution for counter-rotating fields, providing experimental validation of the theoretical model explaining the generation of circularly polarized high harmonic light. Second, we discover that there is significant electron-ion rescattering using counter-rotating fields, but not with co-rotating fields. Finally, we show that the rescattered electrons are well separated from the directly ionized electrons, in striking contrast to similar low-energy structures seen with linearly polarized fields. These findings help overcome the long-standing problem of how to decouple the tunneling and rescattering steps in strong-field ionization, which will enable new dynamic probes of atomic and molecular structure.

Research Organization:
Univ. of Colorado, Boulder, CO (United States); National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; US Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); German Research Foundation (DFG); Swedish Research Council (SRC); e USA-Israel Binational Science Foundation (BSF); Japan Society for the Promotion of Science (JSPS)
Grant/Contract Number:
FG02-99ER14982; DGE-1144083; GR-4234/1-1; C24540421
OSTI ID:
1690344
Alternate ID(s):
OSTI ID: 1181298
Journal Information:
Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 91, Issue 3; ISSN 1050-2947
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 122 works
Citation information provided by
Web of Science

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Cited By (21)

Electron rotational asymmetry in strong-field photodetachment from F by circularly polarized laser pulses journal February 2019
Two-dimensional photoelectron holography in strong-field tunneling ionization by counter rotating two-color circularly polarized laser pulses journal January 2019
Initializing anisotropic electron velocity distribution functions in optical-field ionized plasmas journal January 2020
Non-collinear generation of angularly isolated circularly polarized high harmonics journal September 2015
Electron rotational asymmetry in strong-field photodetachment from F$^-$ by circularly polarized laser pulses text January 2019
Exterior time scaling with the stiffness-free Lanczos time propagator: Formulation and application to atoms interacting with strong midinfrared lasers journal March 2016
Two-color phase-of-the-phase spectroscopy with circularly polarized laser pulses journal November 2018
Elements of the quantitative rescattering theory journal April 2018
Exterior time scaling with stiffness-free Lanczos time propagator: formulation and application to atoms interacting with strong mid-infrared lasers text January 2015
Modeling tomographic measurements of photoelectron vortices in counter-rotating circularly polarized laser pulses text January 2019
Channel-closing effects in strong-field ionization by a bicircular field journal February 2018
Molecules in a bicircular strong laser field journal April 2018
Modeling tomographic measurements of photoelectron vortices in counter-rotating circularly polarized laser pulses journal December 2019
Study of the circular dichroism of He + ion journal January 2019
Probing atomic and molecular targets by intense bicircular counter-rotating laser fields journal June 2018
Helicity asymmetry in strong-field ionization of atoms by a bicircular laser field journal January 2018
Spectroscopy of atomic orbital sizes using bi-elliptical high-order harmonic generation journal October 2019
Nonsequential double ionization by co-rotating two-color circularly polarized laser fields journal January 2019
Polarization-fan high-order harmonics journal January 2017
Non-Sequential Double Ionization by Counter Rotating Circularly Polarized Two-Color Laser Fields text January 2016
Electron spin polarization in strong-field ionization of xenon atoms journal June 2016