Nonlinear polarization and ionization in O2: metastable electronic state model

Jonathan Heinz, Ran Reiff, Tennesse Joyce, Andreas Becker, Agnieszka Jaron-Becker, Miroslav Kolesik

Research output: Contribution to journalArticlepeer-review

Abstract

We present a computational model for the nonlinear response of molecular oxygen exposed to strong mid-wavelength and long-wavelength infrared optical fields. Based on a non-Hermitian approach utilizing metastable electronic states, the nonlinear polarization and strong-field ionization are described as intimately connected properties. Good agreement with the measured nonlinear index and ionization rates is shown, and parameterized response functions are provided to facilitate applications in large-scale simulations of infrared optical pulses interacting with gaseous media.

Original languageEnglish (US)
Pages (from-to)25022-25036
Number of pages15
JournalOptics Express
Volume28
Issue number17
DOIs
StatePublished - Aug 17 2020

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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