کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7887938 | 1509790 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
CO2 laser-assisted preparation of transparent Eu2Ti2O7 thin films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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 25â¯nm to 45â¯nm. A film of a thickness 480â¯nm exhibited an optical transmission of 91.9% that is close to the maximal theoretical limit. The film's refractive index at 632â¯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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 8, 1 June 2018, Pages 9479-9483
Journal: Ceramics International - Volume 44, Issue 8, 1 June 2018, Pages 9479-9483
نویسندگان
Jan Mrázek, Jan Aubrecht, Filip Todorov, JiÅà BurÅ¡Ãk, Viktor Puchý, Robert Džunda, SoÅa VytykáÄová, Ivan KaÅ¡Ãk,