Ablation of gold film on different substrates by ultrafast laser

IV. Ikergazte. Nazioarteko ikerketa euskaraz. Kongresuko artikulu bilduma. Zientziak eta Natura Zientzia

“…Izan ere, 1980 urtetik aurrera, gero eta ikerketa eta aurrerapen gehiago burutu dira laserren esparruan. Halaber, teknologia berrien aurrerapenarekin batera, metalezko estaldura meheen erabilera handitu da industria, medikuntza eta biologia bezalako sektoreetan (Zhou et al, (2020)).…”

“…Ablazio-prozesuak burutzerako orduan, fluentzia-ataria deritzon energia jakin bat behar da ablazioari hasiera emateko. Parametro hau metalaren propietate optikoen eta termodinamikoen araberakoa da, hortaz, honen azterketa funtsezko erronka da ablazio-prozesuak kontrolatzeko eta hobetzeko orduan (Zhou et al, (2020)).…”

The effect of enhanced heat transfer across metal–nonmetal interfaces subject to femtosecond laser irradiation

“…6,7 Considering the electron-phonon nonequilibrium induced by femtosecond laser irradiation, the two-temperature model (TTM) with a metal-nonmetal interface has been widely adopted in studying the heat transfer across the metal-nonmetal interface. 9,[18][19][20] The strength of heat transfer across the metal-nonmetal interface was found to affect the melting 9,18 and ablation behavior 19 of the metal film subject to femtosecond laser irradiation. The enhancement of heat transfer across the metal-nonmetal interface by inserting an interlayer with great electron-phonon coupling strength was predicted with the TTM, 20 which was subsequently validated by experimental measurements.…”

“…The interband transition is calculated from the Lorentz oscillator terms, which are obtained by fitting the experimental measurements 7,31,32 and theoretical calculations. 28 To the best of the authors' knowledge, the current numerical studies 9,18,19 of heat transfer across a metal-nonmetal interface under electron-phonon nonequilibrium ignored the interfacial thermal circuit, which was experimentally detected. 6,7 Therefore, from the perspective of a parallel-series thermal circuit, the effect of heat transfer across a metal-nonmetal interface subject to femtosecond laser irradiation is investigated in the present work.…”

Green wavelength femtosecond laser ablated copper surface

“…For experimentation, laser parameters such as laser wavelength, fluence, and pulse duration have been used to investigate the surface morphology and ablation threshold [2][3][4][5][6]. On the other hand, the two-temperature model (TTM) with a dynamic optical model, linear absorption model, and phase explosion model have been used to investigate the mechanism of laser-material interaction [7][8][9][10][11][12][13][14]. Among the investigations on copper, the IR wavelengths regime [2,3,[5][6][7][8][9][10][11][12][13][14] was the main focus, and the green wavelength regime has been rarely discussed.…”