Numerical studies of dielectric material modifications by a femtosecond Bessel–Gauss laser beam
نویسندگان
چکیده
Femtosecond Bessel–Gauss beams are attractive tools to a large area of laser processes including high aspect ratio volume nanostructuration in dielectric materials. Understanding the material response femtosecond beam irradiation is key controlling its modifications and designing new structures. In this work, we show how ionization affects propagation can limit energy deposition. By performing 2D/3D numerical simulations, evaluate absorbed subsequent modifications. First, model electron dynamics coupled 3D effects. Then, consider 2D thermo-elasto-plastic simulations characterize medium Results that ionized matter induces screening incident gaussian which form Bessel-Gauss beam. This effect leads limitation maximum deposition even if increases. It be reduced tigthly focused used as angular aperture cone along distributed larger.
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ژورنال
عنوان ژورنال: Applied Physics A
سال: 2021
ISSN: ['1432-0630', '0947-8396']
DOI: https://doi.org/10.1007/s00339-021-04476-y