Laser processing of Yb 3+ / Er 3+ co-doped LiYF 4 thin films with up-conversion properties
| Autor: | F. Stokker-Cheregi, M Secu, C E Secu, S. Brajnicov, Maria Dinescu, Valentin Ion |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Analytical chemistry 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences law.invention Pulsed laser deposition chemistry.chemical_compound law Materials Chemistry Thin film Maple Metals and Alloys Surfaces and Interfaces 021001 nanoscience & nanotechnology Laser Evaporation (deposition) 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry engineering Nanometre 0210 nano-technology Luminescence Fluoride |
| Zdroj: | Thin Solid Films. 625:6-10 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2017.01.057 |
| Popis: | We present a comparative study between the properties of Yb3 +/Er3 + co-doped LiYF4 thin films obtained by pulsed laser deposition (PLD) and matrix-assisted pulsed evaporation (MAPLE) growth techniques, respectively. We performed structural, morphological, and optical analyses in order to draw a conclusion about the potential of MAPLE as a growth technique used for the obtaining of RE-doped fluoride thin films having up-conversion properties. For both techniques the surface morphology is typical for laser processed thin films of RE-doped fluorides, with roughness values of the order of few hundreds of nanometers and a higher density of defects in the sample obtained by MAPLE. Up-conversion properties do not exhibit major differences between the thin film samples and the pressed target. Under 980 nm laser light pumping, both Yb3 +/Er3 + co-doped LiYF4 thin film samples, obtained by PLD and MAPLE, show green ((2H11/2, 4S3/2) → 4I15/2) and red (4F9/2 → 4I15/2) up-conversion luminescence explained by a two-photon processes. Therefore MAPLE is a viable growth technique for the fundamental study of RE-doped fluoride thin films and their respective functional properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect