On the parameters influencing the formation of microelements in the Ge-As-S glasses by visible CW laser direct writing

0585999 - ÚTAM 2025 RIV NL eng J - Journal Article
Kutálek, P. - Samsonova, E. - Smolík, J. - Knotek, P. - Schwarz, J. - Černošková, E. - Zárybnická, Lucie - Tichý, L.
On the parameters influencing the formation of microelements in the Ge-As-S glasses by visible CW laser direct writing.
Applied Surface Science. Roč. 665, August (2024), č. článku 160297. ISSN 0169-4332. E-ISSN 1873-5584
Institutional support: RVO:68378297
Keywords : Ge-As-S chalcogenide glasses * laser direct writing * CW lasers * microelements
OECD category: Materials engineering
Impact factor: 6.7, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.apsusc.2024.160297

CW laser direct writing was successfully performed into the Ge-As-S annealed bulk glasses having different mean
coordination numbers (CN) ranging between 2.32 and 2.67. Visible light lasers operating at three different wavelengths (447, 532 and 655 nm) were used to determine the key parameters controlling the formation of microelements on the surface of studied glasses. The formation of the highest microlenses was induced for all samples by the laser operating at 532 nm, mainly due to the significant role of the optical penetration depth of the light used, which in this case was close to the sample thickness. The influence of other parameters (Tg, CTE, structural arrangement inferred from Raman spectroscopy) that could further enhance the formation of microlenses was also discussed. The microlines and microlenses array, potentially applicable e.g. as passive optical elements, were formed for the sample with CN = 2.32, which provided the formation of the highest microlenses. The created microelements were characterized by energy-dispersive X-ray analysis and force spectroscopy to detect possible changes in their relevant properties.
Permanent Link: https://hdl.handle.net/11104/0353619