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Authors: Anna Bogatskaya 1 ; 2 ; Ekaterina A. Volkova 3 and Alexander Popov 1 ; 2

Affiliations: 1 Department of Physics, Lomonosov Moscow State University, 1199991, Moscow, Russia ; 2 Lebedev Physical Institute, Russian Academy of Sciences, 119991, Moscow Russia ; 3 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 1199991, Moscow, Russia

Keyword(s): Laser Microstructuring in Dielectrics, Birefringent Nanolattices, Fused Silica, Multiphoton Ionization of Dielectrics, Plasma Formation, Numerical Modelling, Wave Equation.

Abstract: In this work, a numerical study of the formation of plasma periodic subwavelength nanogratings in fused silica along the propagation of a focused laser pulse is carried out. It is shown that the tightly focused beam creates a supercritical plasma in the focal plane, which provides an effective reflection of the parts of incident and reflected laser pulse. As a result, standing wave of ionization occurs which generates a plasma lattice with a period equal to the period of the standing wave in the medium. The results of modelling allow us to determine the optimal laser parameters in the regime of linear (geometrical) focusing when the contrast nanogratings can emerge. Analysis of energy release processes with subsequent melting of the fused silica sample confirms the previously proposed mechanism of laser modification.

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Paper citation in several formats:
Bogatskaya, A.; A. Volkova, E. and Popov, A. (2024). Subwavelength Plasma Gratings Formation in the Process of Laser Modification in the Volume of Fused Silica. In Proceedings of the 12th International Conference on Photonics, Optics and Laser Technology - PHOTOPTICS; ISBN 978-989-758-686-6; ISSN 2184-4364, SciTePress, pages 15-20. DOI: 10.5220/0012375200003651

@conference{photoptics24,
author={Anna Bogatskaya. and Ekaterina {A. Volkova}. and Alexander Popov.},
title={Subwavelength Plasma Gratings Formation in the Process of Laser Modification in the Volume of Fused Silica},
booktitle={Proceedings of the 12th International Conference on Photonics, Optics and Laser Technology - PHOTOPTICS},
year={2024},
pages={15-20},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0012375200003651},
isbn={978-989-758-686-6},
issn={2184-4364},
}

TY - CONF

JO - Proceedings of the 12th International Conference on Photonics, Optics and Laser Technology - PHOTOPTICS
TI - Subwavelength Plasma Gratings Formation in the Process of Laser Modification in the Volume of Fused Silica
SN - 978-989-758-686-6
IS - 2184-4364
AU - Bogatskaya, A.
AU - A. Volkova, E.
AU - Popov, A.
PY - 2024
SP - 15
EP - 20
DO - 10.5220/0012375200003651
PB - SciTePress