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Tailoring caustics in high-harmonic generation with phase-controlled multi-colour fields

Mitra, S and Biswas, S and Schötz, J and Förg, B and Okell, W and Kavuri, GA and Högner, M and Pupeza, I and Wnuk, P and Kling, MF (2019) Tailoring caustics in high-harmonic generation with phase-controlled multi-colour fields. In: Conference on Lasers and Electro-Optics Europe and European Quantum Electronics, 23 June 2019 to 27 June 2019, Munich; Germany.

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Official URL: https://dx.doi.org/10.1109/CLEOE-EQEC.2019.8872440


High harmonic generation (HHG) using intense laser pulses has long proven to be an extremely reliable source of high-energy, ultrashort (down to few tens of attoseconds) and coherent light radiation. This has promoted HHG as the tool of choice for numerous scientific applications. As understood by the three-step model, HHG is a highly nonlinear process which is strongly dependent on the classical electric field shapes of the driving laser pulse 1. Thus, a common approach to control the HHG spectrum has been by modifying this electric field. Previous works in this direction primarily focused on weak perturbative approaches to either modify the ionization probability, suppress electron re-scattering by slight modification of the electron trajectory or use macroscopic manipulation of the generating medium. Our work focuses on a significantly less explored area 2,3, where the driving electric field structure is very strongly modified by a secondary field. This causes drastic changes in re-colliding electron trajectories, leading to highly modified HHG spectra as a function of their relative phase.

Item Type: Conference Paper
Publication: Optics InfoBase Conference Papers
Publisher: Institute of Electrical and Electronics Engineers Inc.
Additional Information: cited By 0; Conference of The European Conference on Lasers and Electro-Optics, CLEOEurope₂₀₁₉ ; Conference Date: 23 June 2019 Through 27 June 2019; Conference Code:142098
Keywords: Electric fields; Laser pulses, Coherent light radiation; Electric field shape; Electric field structures; Electron trajectories; High harmonic generation; Ionization probabilities; Perturbative approach; Scientific applications, Harmonic generation
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 09 Jun 2020 05:45
Last Modified: 09 Jun 2020 05:45
URI: http://eprints.iisc.ac.in/id/eprint/65553

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