Fluorescence of Eu<sup>3+</sup> ions in TiO<sub>2</sub> optical planar waveguides fabricated by the sol-gel method

Bouazaoui, Mohamed; Bahtat, M.; Bahtat, A.; Mugnier, J.

doi:10.1051/jp4:1994481

Cited by 3 publications

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“…Eu 3+ ions have been added to SiO2 3-8 , SnO2 [9][10][11][12] and TiO2 [13][14][15] with the main goal to understand the structural features well reflected in the observed spectroscopic characteristics.…”

Section: Introductionmentioning

confidence: 99%

Optical properties of ZrO2, SiO2 and TiO2-SiO2 xerogels and coatings doped with Eu3+ and Eu2+

et al. 1999

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Eu3+ doped bulk monoliths and thin films were obtained by sol-gel methods in the ZrO2, SiO2 and SiO2-TiO2 systems. Eu3+ 5D0 ® 7FJ emission and decay time characteristics were measured during the entire experimental preparation route from the initial sol to the final xerogels. The crystalline phases identified were tetragonal ZrO2 and mixtures of rutile and anatase TiO2 at high temperature treatments in bulk samples. Good quality thin films were obtained for all systems by dip-coating optical glasses (Schott BK270). The same spectroscopic features were observed either for the bulk monoliths or the films. By appropriate heat treatments under H2 atmosphere Eu2+ containing samples could be obtained in the SiO2-TiO2 system

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Section: Introductionmentioning

confidence: 99%

Optical properties of ZrO2, SiO2 and TiO2-SiO2 xerogels and coatings doped with Eu3+ and Eu2+

et al. 1999

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“…These excitation wavelengths corresponds to a direct excitation from valence band to conduction band in Gd 2 O 3 and Gd 2 Ti 2 O 7 . The positions of the main Eu 3+ emission lines in cubic Gd 2 O 3 phases , in Gd 2 Ti 2 O 7 phases , , and in TiO 2 phases are reported in Figure for comparison.…”

Section: Resultsmentioning

confidence: 98%

Thin Film Growth Using Hetero Embryo: Demonstration on Pyrochlore Phase

Pillonnet

Bihan

Masenelli

et al. 2010

ACS Appl. Mater. Interfaces

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The paper reports the possible use of nanoparticles embedded in amorphous host as hetero embryos in order to grow complex crystalline phases as thin film. Demonstration is performed in the prototypical case of pyrochlore phase Gd(2)Ti(2)O(7) grown from Gd(2)O(3) nanoparticles embedded in TiO(2) matrix at low temperature. As embryos, two kinds of nanoparticles are compared: clusters deposited by low energy cluster beam deposition (LECBD) and nanostructured films elaborated by sol-gel process. The growth has been analyzed by X-ray diffraction and transmission electron microscopy. Furthermore, the nanoparticles have been doped with Eu(3+) luminescence probes in order to follow the nucleation mechanisms at the atomic scale. It is shown that the size, shape, and composition of hetero embryos and as well their interfaces are of paramount importance to enhance the formation of complex materials, such as pyrochlore. By this mean, the first step in classical nucleation science, controlling the height of the energetic barrier, is skipped and the synthesis conditions can be eased.

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Sol–gel silica/titania-on-silicon Er/Yb-doped waveguides for optical amplification at 1.5 μm

Orignac¹,

Barbier²,

Du³

et al. 1999

Optical Materials

249

100

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Fluorescence of Eu³⁺ ions in TiO₂ optical planar waveguides fabricated by the sol-gel method

Cited by 3 publications

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Optical properties of ZrO2, SiO2 and TiO2-SiO2 xerogels and coatings doped with Eu3+ and Eu2+

Optical properties of ZrO2, SiO2 and TiO2-SiO2 xerogels and coatings doped with Eu3+ and Eu2+

Thin Film Growth Using Hetero Embryo: Demonstration on Pyrochlore Phase

Sol–gel silica/titania-on-silicon Er/Yb-doped waveguides for optical amplification at 1.5 μm

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Fluorescence of Eu3+ ions in TiO2 optical planar waveguides fabricated by the sol-gel method

Cited by 3 publications

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Optical properties of ZrO2, SiO2 and TiO2-SiO2 xerogels and coatings doped with Eu3+ and Eu2+

Optical properties of ZrO2, SiO2 and TiO2-SiO2 xerogels and coatings doped with Eu3+ and Eu2+

Thin Film Growth Using Hetero Embryo: Demonstration on Pyrochlore Phase

Sol–gel silica/titania-on-silicon Er/Yb-doped waveguides for optical amplification at 1.5 μm

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Fluorescence of Eu³⁺ ions in TiO₂ optical planar waveguides fabricated by the sol-gel method