Linear-to-circular polarization conversion with full-silica meta-optics to reduce nonlinear effects in high-energy lasers

Nicolas Bonod (), Pierre Brianceau, Jérôme Daurios, Sylvain Grosjean, Nadja Roquin, Jean-Francois Gleyze, Laurent Lamaignère () and Jérôme Neauport ()
Additional contact information
Nicolas Bonod: Institut Fresnel
Pierre Brianceau: CEA GRENOBLE
Jérôme Daurios: CEA CESTA
Sylvain Grosjean: CEA CESTA
Nadja Roquin: CEA CESTA
Jean-Francois Gleyze: CEA CESTA
Laurent Lamaignère: CEA CESTA
Jérôme Neauport: CEA CESTA

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract High-energy lasers have benefited from intense efforts to bring light-matter interactions to new standards and to achieve laser fusion ignition. One of the main issues to further increasing laser energy is the resistance of optical materials to high laser fluences, in particular at the final stage of the laser beamline where nonlinear Kerr effects can occur in optical materials and provoke laser filamentation. One promising way to mitigate this process is to reduce the nonlinear susceptibility of the material by switching the polarization from a linear to a circular state. Here, we report a significant reduction in the laser filamentation effect on glass by using a full-silica metamaterial waveplateable to switch the linear-to-circular polarization of high fluence laser beams. This result is achieved through the use of a large size full-silica meta-optics exhibiting nominal polarization conversion associated with an excellent transmission efficiency and wavefront quality, as well as a high laser damage resistance.

Date: 2023
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DOI: 10.1038/s41467-023-40709-9

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