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 - Journal Article
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
R&D Projects: GA MŠMT EF15_003/0000445
Grant - others:OP VVV - BIATRI(XE) CZ.02.1.01/0.0/0.0/15_003/0000445
Institutional support: RVO:68378271
Keywords : volumetric modification * femtosecond laser pulses * laser processing * fused silica * Maxwell’s equations * thermoelastoplastic modeling
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.4, year: 2022
Method of publishing: 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.
Permanent Link: https://hdl.handle.net/11104/0344661