University of PardubiceFaculty of Chemical Technology

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Photoinduced Expansion of PbO-Based Heavy Metal Oxide Glasses

Authors: Smolík Jan | Knotek Petr | Kutálek Petr | Schwarz Jiří | Černošková Eva

Year: 2019

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Photoinduced Expansion of PbO-Based Heavy Metal Oxide Glasses	Microlenses on the surface of oxide glasses have been formed by the laser direct writting. Microlenses were created by laser (447 nm, 430 mW) focused to the diameter ≈ 180 µm. From the dependence of the microlenses height on the logarithm of radiation intensity which hits the sample surface, the threshold valueof the microlenses formation (Fth) was determined. The influence of the material thickness on the microlenses formation was studied as well. The values of Fth decrease exponentially with an exposure time increase. The highest created microlenses (h = 1900 nm, FWHM = 150 µm) were obtained on the surface of 74.7PbO-25.3Ga2O3 glass. The height of microlenses has not been changed even after 9 months. The properties of microlenses such as the chemical composition, structure and stiffness were compared with the above mentioned properties of non-illuminated surface. Based on the obtained results, we assume that the predominant mechanism of the microlenses formation is thermal expansion.	micro-lenses; glass; laser direct writting