Space-Time resolved simulation of femtosecond nonlinear light-matter interactions using a holistic quantum atomic model: Application to near-Threshold harmonics

Miroslav Kolesik, Ewan M Wright, J. Andreasen, J. M. Brown, D. R. Carlson, Ronald J Jones

Research output: Contribution to journalArticle

4 Scopus citations


We introduce a new computational approach for femtosecond pulse propagation in the transparency region of gases that permits full resolution in three space dimensions plus time while fully incorporating quantum coherent effects such as high-harmonic generation and strong-field ionization in a holistic fashion. This is achieved by utilizing a onedimensional model atom with a delta-function potential which allows for a closed-form solution for the nonlinear optical response due to ground-state to continuum transitions. It side-steps evaluation of the wave function, and offers more than one hundred-fold reduction in computation time in comparison to direct solution of the atomic Schrödinger equation. To illustrate the capability of our new computational approach, we apply it to the example of near-Threshold harmonic generation in Xenon, and we also present a qualitative comparison between our model and results from an in-house experiment on extreme ultraviolet generation in a femtosecond enhancement cavity.

Original languageEnglish (US)
Pages (from-to)16113-16128
Number of pages16
JournalOptics Express
Issue number14
Publication statusPublished - Jul 2 2012


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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