From localized laser energy absorption to absorption delocalization at volumetric glass modification with Gaussian and doughnut-shaped pulses

0574315 - FZÚ 2024 RIV CH eng J - Článek v odborném periodiku
Zukerstein, Martin - Zhukov, Vladimir - Meshcheryakov, Y.P. - Bulgakova, Nadezhda M.
From localized laser energy absorption to absorption delocalization at volumetric glass modification with Gaussian and doughnut-shaped pulses.
Photonics. Roč. 10, č. 8 (2023), č. článku 882. E-ISSN 2304-6732
Grant CEP: GA MŠMT EF15_003/0000445
Grant ostatní: OP VVV - BIATRI(XE) CZ.02.1.01/0.0/0.0/15_003/0000445
Institucionální podpora: RVO:68378271
Klíčová slova: volumetric modification * femtosecond laser pulses * laser processing * fused silica * Maxwell’s equations * thermoelastoplastic modeling
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 2.4, rok: 2022
Způsob publikování: Open access

Volumetric modification of transparent materials by femtosecond laser pulses is successfully used in a wide range of practical applications. The level of modification is determined by the locally absorbed energy density, which depends on numerous factors. In this work, it is shown experimentally and theoretically that, in a certain range of laser pulse energies, the peak of absorption of laser radiation for doughnut-shaped (DS) pulses is several times higher than for Gaussian ones. This fact makes the DS pulses very attractive for material modification and direct laser writing applications. Details of the interactions of laser pulses of Gaussian and doughnut shapes with fused silica obtained by numerical simulations are presented for different pulse energies and compared with the experimentally obtained data.
Trvalý link: https://hdl.handle.net/11104/0344661