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  • 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
  • (Optica Publishing Group, 2017),
  • paper CG_P_19

High-harmonic spectroscopy with two-color counter-rotating bi-circular fields

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Abstract

High-harmonic generation (HHG) is a nonlinear process that converts intense infrared (IR) radiation into high-frequency light [1,2]. It can be understood as a sequence of three steps: (1) tunnel ionization of an atom or a molecule induced by the strong IR field, (2) laser-driven acceleration of the electron in the continuum, and (3) recombination with the parent ion resulting in the emission of harmonic light. Since there is a well-defined relationship between the duration of the electron excursion and the energy released during recombination, the harmonic spectrum provides snapshots of the laser-induced dynamics in the ion [3]. Very recently, the application of elliptically polarized fields has allowed to probe molecular chirality with sub-femtosecond time resolution [4], opening new directions in high-harmonic spectroscopy [5].

© 2017 IEEE

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