Interaction of a single-cycle laser pulse with a bound electron without ionization

Ufuk Parali, Dennis R. Alexander

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

In this paper, interaction of an ultrashort single-cycle pulse (USCP) with a bound electron without ionization is reported for the first time. For a more realistic mathematical description of USCPs, Hermitian polynomials and combination of Laguerre functions are used for two different single cycle excitation cases. These single cycle pulse models are used as driving functions for the classical approach to model the interaction of a bound electron with an applied electric field. A new novel time-domain technique was developed for modifying the classical Lorentz damped oscillator model in order to make it compatible with USCP excitation. This modification turned the Lorentz oscillator model equation into a Hill-like function with non-periodic time varying damping and spring coefficients. Numerical results are presented for two different excitation models and for varying spring and damping constants. Our two driving model excitations provide quite different time response of the bound electron. Different polarization response will subsequently result in relative differences in the time dependent index of refraction.

Original languageEnglish (US)
Pages (from-to)15155-15168
Number of pages14
JournalOptics Express
Volume18
Issue number14
DOIs
StatePublished - Jul 5 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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