Femtosecond laser-induced periodic surface structures on fused silica: the impact of the initial substrate temperature

0493519 - FZÚ 2019 RIV CH eng J - Článek v odborném periodiku
Gräf, S. - Kunz, C. - Engel, S. - Derrien, Thibault - Müller, F.A.
Femtosecond laser-induced periodic surface structures on fused silica: the impact of the initial substrate temperature.
Materials. Roč. 11, č. 8 (2018), s. 1-16, č. článku 1340. E-ISSN 1996-1944
Grant CEP: GA MŠMT LO1602; GA ČR GA16-12960S; GA MŠMT EF15_006/0000674
GRANT EU: European Commission(XE) 657424 - QuantumLaP
Grant ostatní: OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institucionální podpora: RVO:68378271
Klíčová slova: CO₂ laser * fs-laser * fused silica * hydrodynamic instabilities * laser-induced periodic surface structures (LIPSS) * substrate temperature * supra-wavelength
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 2.972, rok: 2018

The formation and properties of las.-induced periodic surface struct.(LIPSS)were investigated upon fs-las. irradiation of fused silica at different initial substrate temperatures,TS.For substrate heating between room temperature,TRT,and TS=1200°C,a continuous wave CO₂laser was used as the radiation source.The surface structures generated in the air environment at normal incidence with five successive fs-laser pulses(pulse duration,τ = 300 fs,laser wavelength,λ = 1025 nm,repetition frequency, frep=1kHz)were characterized by using optical microscopy,scanning electron microscopy,and 2D-Fourier transform analysis.The threshold fluence of fused silica was systematically investigated as a function of TS.It was shown that the threshold fluence for the formation of low-spatial frequency LIPSS(LSFL)decreases with increasing TS.The results reveal that the initial spatial period observed at TRT is notably increased by increasing TS,finally leading to the formation of supra-wavelength LIPSS.
Trvalý link: http://hdl.handle.net/11104/0286872