by George D. Tsibidis, Luc Museur and Andrei Kanaev
Abstract:
A theoretical investigation of the underlying ultrafast processes upon irradiation of rutile TiO2 of (001) and (100) surface orientation with femtosecond (fs) double pulsed lasers was performed in ablation conditions, for which, apart from mass removal, phase transformation and surface modification of the heated solid were induced. A parametric study was followed to correlate the transient carrier density and the produced lattice temperature with the laser fluence, pulse separation and the induced damage. The simulations showed that both temporal separation and crystal orientation influence the surface pattern, while both the carrier density and temperature drop gradually to a minimum value at temporal separation equal to twice the pulse separation that remain constant at long delays. Carrier dynamics, interference of the laser beam with the excited surface waves, thermal response and fluid transport at various pulse delays explained the formation of either subwavelength or suprawavelength structures. The significant role of the crystalline anisotropy is illustrated through the presentation of representative experimental results correlated with the theoretical predictions.
Reference:
George D. Tsibidis, Luc Museur and Andrei Kanaev, “The Role of Crystalline Orientation in the Formation of Surface Patterns on Solids Irradiated with Femtosecond Laser Double Pulses”, In Applied Sciences, vol. 10, no. 24, pp. 8811, 2020.
Bibtex Entry:
@article{tsibidis_role_2020,
	title = {The {Role} of {Crystalline} {Orientation} in the {Formation} of {Surface} {Patterns} on {Solids} {Irradiated} with {Femtosecond} {Laser} {Double} {Pulses}},
	volume = {10},
	copyright = {http://creativecommons.org/licenses/by/3.0/},
	url = {https://www.mdpi.com/2076-3417/10/24/8811},
	doi = {10.3390/app10248811},
	abstract = {A theoretical investigation of the underlying ultrafast processes upon irradiation of rutile TiO2 of (001) and (100) surface orientation with femtosecond (fs) double pulsed lasers was performed in ablation conditions, for which, apart from mass removal, phase transformation and surface modification of the heated solid were induced. A parametric study was followed to correlate the transient carrier density and the produced lattice temperature with the laser fluence, pulse separation and the induced damage. The simulations showed that both temporal separation and crystal orientation influence the surface pattern, while both the carrier density and temperature drop gradually to a minimum value at temporal separation equal to twice the pulse separation that remain constant at long delays. Carrier dynamics, interference of the laser beam with the excited surface waves, thermal response and fluid transport at various pulse delays explained the formation of either subwavelength or suprawavelength structures. The significant role of the crystalline anisotropy is illustrated through the presentation of representative experimental results correlated with the theoretical predictions.},
	language = {en},
	number = {24},
	urldate = {2021-01-18},
	journal = {Applied Sciences},
	author = {Tsibidis, George D. and Museur, Luc and Kanaev, Andrei},
	month = jan,
	year = {2020},
	note = {Number: 24
Publisher: Multidisciplinary Digital Publishing Institute},
	keywords = {carrier dynamics, crystal orientation, double pulse irradiation of solids, heat transfer, multiscale modelling of laser-matter interaction, phase transitions, surface patterning, surface plasmon excitation, ultrashort laser pulses},
	pages = {8811},
	file = {Full Text PDF:C:\Users\abm50\Zotero\storage\DSI4Z285\Tsibidis et al. - 2020 - The Role of Crystalline Orientation in the Formati.pdf:application/pdf;Snapshot:C:\Users\abm50\Zotero\storage\VST9RWZF\8811.html:text/html}
}