Ionization waves of arbitrary velocity driven by a flying focus

A chirped laser pulse focused by a chromatic lens exhibits a dynamic, or flying, focus in which the trajectory of the peak intensity decouples from the group velocity. In a medium, the flying focus can trigger an ionization front that follows this trajectory. By adjusting the chirp, the ionization f...

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Published in:Physical review. A 2018-03, Vol.97 (3), Article 033835
Main Authors: Palastro, J. P., Turnbull, D., Bahk, S.-W., Follett, R. K., Shaw, J. L., Haberberger, D., Bromage, J., Froula, D. H.
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Language:English
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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
laser-plasma interactions
light propagation, transmission and absorption
multiphoton or tunneling ionization and excitation
plasma ionization
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cited_by cdi_FETCH-LOGICAL-c367t-2e70c738d7dfa8f521a3d38ddd41a70723c18af06d73b9c03cb191ab4b145a683
cites cdi_FETCH-LOGICAL-c367t-2e70c738d7dfa8f521a3d38ddd41a70723c18af06d73b9c03cb191ab4b145a683
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container_issue 3
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container_title Physical review. A
container_volume 97
creator Palastro, J. P.
Turnbull, D.
Bahk, S.-W.
Follett, R. K.
Shaw, J. L.
Haberberger, D.
Bromage, J.
Froula, D. H.
description A chirped laser pulse focused by a chromatic lens exhibits a dynamic, or flying, focus in which the trajectory of the peak intensity decouples from the group velocity. In a medium, the flying focus can trigger an ionization front that follows this trajectory. By adjusting the chirp, the ionization front can be made to travel at an arbitrary velocity along the optical axis. For this study, we present analytical calculations and simulations describing the propagation of the flying focus pulse, the self-similar form of its intensity profile, and ionization wave formation. The ability to control the speed of the ionization wave and, in conjunction, mitigate plasma refraction has the potential to advance several laser-based applications, including Raman amplification, photon acceleration, high-order-harmonic generation, and THz generation.
doi_str_mv 10.1103/PhysRevA.97.033835
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subjects 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
laser-plasma interactions
light propagation, transmission and absorption
multiphoton or tunneling ionization and excitation
plasma ionization
title Ionization waves of arbitrary velocity driven by a flying focus
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