Number of the records: 1
CO2 laser-assisted preparation of transparent Eu2Ti2O7 thin films
- 1.
SYSNO ASEP 0499886 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title CO2 laser-assisted preparation of transparent Eu2Ti2O7 thin films Author(s) Mrázek, Jan (URE-Y) RID, ORCID
Aubrecht, Jan (URE-Y) RID
Todorov, Filip (URE-Y)
Buršík, Jiří (UFM-A) RID, ORCID
Puchý, V. (SK)
Džunda, R. (SK)
Vytykáčová, Soňa (URE-Y)
Kašík, Ivan (URE-Y) RIDNumber of authors 8 Source Title Ceramics International. - : Elsevier - ISSN 0272-8842
Roč. 44, č. 8 (2018), s. 9479-9483Number of pages 5 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords Sol-gel processes ; Optical properties ; Films Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Subject RIV - cooperation Institute of Physics of Materials - Solid Matter Physics ; Magnetism Institutional support URE-Y - RVO:67985882 ; UFM-A - RVO:68081723 UT WOS 000430522200093 EID SCOPUS 85042615996 DOI 10.1016/j.ceramint.2018.02.165 Annotation We present a laser-assisted preparation of transparent europium-titanate Eu2Ti2O7 thin films with tailored structural and optical properties. We have evaluated the effects of the irradiation time on the structural and the optical properties of the films. This approach allows the preparation of nanocrystalline crack-free films and micro patterns. The amorphous thin films were prepared by a sol-gel method. The films were annealed by a CO2 laser beam for various time intervals. The laser irradiation induced a crystallization process that resulted in the formation of Eu2Ti2O7 nanocrystals. The nanocrystals regularly grew with increasing irradiation time reaching the size from 25 nm to 45 nm. A film of a thickness 480 nm exhibited an optical transmission of 91.9% that is close to the maximal theoretical limit. The film's refractive index at 632 nm was 2.26. A micrometric pattern was prepared by a direct laser writing followed by a wet chemical etching. Feasibility of the demonstrated approach, together with the high film's quality, and europium-titanate chemical resistivity open up many opportunities for advanced applications. The approach can be used for a preparation of protective coatings and integrated photonic devices such as planar optical waveguides and couplers Workplace Institute of Radio Engineering and Electronics Contact Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Year of Publishing 2019
Number of the records: 1