Characterization and Effect of Hydrogen Treatment and UV Irradiation on Photosensitive Sol−Gel Derived Aluminosilicate Planar Waveguides

2000 ◽  
Vol 104 (5) ◽  
pp. 926-930
Author(s):  
J. M. Nedelec ◽  
J. Grimblot ◽  
S. Turrell ◽  
M. Bouazaoui
Keyword(s):  
Uv Irradiation ◽  
Sol Gel ◽  
Planar Waveguides ◽  
Hydrogen Treatment

scholarly journals Photocrosslinking and photopatterning of magneto-optical nanocomposite sol–gel thin film under deep-UV irradiation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
C. Bidaud ◽  
D. Berling ◽  
D. Jamon ◽  
E. Gamet ◽  
S. Neveu ◽  
...  
Keyword(s):  
Uv Irradiation ◽  
Cobalt Ferrite ◽  
Sol Gel ◽  
Optical Devices ◽  
High Concentration ◽  
Nanocomposite Thin Films ◽  
Deep Uv ◽  
High Concentrations ◽  
193 Nm ◽  
The Impact

AbstractThis paper is aimed at investigating the process of photocrosslinking under Deep-UV irradiation of nanocomposite thin films doped with cobalt ferrite magnetic nanoparticles (MNPs). This material is composed of a hybrid sol–gel matrix in which MNP can be introduced with high concentrations up to 20 vol%. Deep-UV (193 nm) is not only interesting for high-resolution patterning but we also show an efficient photopolymerization pathway even in the presence of high concentration of MNPs. In this study, we demonstrate that the photocrosslinking is based on the free radical polymerization of the methacrylate functions of the hybrid precursor. This process is initiated by Titanium-oxo clusters. The impact of the nanoparticles on the photopolymerization kinetic and photopatterning is investigated. We finally show that the photosensitive nanocomposite is suitable to obtain micropatterns with sub-micron resolution, with a simple and versatile process, which opens many opportunities for fabrication of miniaturized magneto-optical devices for photonic applications.

Erbium-activated silica–zirconia planar waveguides prepared by sol–gel route

2008 ◽  
Vol 516 (10) ◽  
pp. 3094-3097 ◽  
Author(s):  
Rogéria R. Gonçalves ◽  
Younes Messaddeq ◽  
Alessandro Chiasera ◽  
Yoann Jestin ◽  
Maurizio Ferrari ◽  
...  
Keyword(s):  
Sol Gel ◽  
Planar Waveguides

scholarly journals SiO2-SnO2:Er3+ Glass-Ceramic Monoliths

2018 ◽  
Author(s):  
Lam Thi Ngoc Tran ◽  
Damiano Massella ◽  
Lidia Zur ◽  
Alessandro Chiasera ◽  
Stefano Varas ◽  
...  
Keyword(s):  
Rare Earth ◽  
Optical Sensors ◽  
Tin Dioxide ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Building Blocks ◽  
Spectroscopic Properties ◽  
Silica Matrix ◽  
Rare Earth Ions ◽  
Planar Waveguides

The development of efficient luminescent systems, such as microcavities, solid state lasers, integrated optical amplifiers, optical sensors is the main topic in glass photonics. The building blocks of these systems are glass-ceramics activated by rare earth ions because they exhibit specific morphologic, structural and spectroscopic properties. Among various materials that could be used as nanocrystals to be imbedded in silica matrix, tin dioxide presents some interesting peculiarities, e.g. the presence of tin dioxide nanocrystals allows increase in both solubility and emission of rare earth ions. Here, we focus our attention on Er3+ - doped silica – tin dioxide photonic glass-ceramics fabricated by sol-gel route. Although the SiO2-SnO2:Er3+ could be fabricated in different geometrical systems: thin films, monoliths and planar waveguides we herein limit ourselves to the monoliths. The effective role of tin dioxide as luminescence sensitizer for Er3+ ions is confirmed by spectroscopic measurements and detailed fabrication protocols are discussed.

Fabrication and Characterization of Low-Loss, Sol-Gel Planar Waveguides

1994 ◽  
Vol 66 (8) ◽  
pp. 1254-1263 ◽  
Author(s):  
Lin. Yang ◽  
S. Scott. Saavedra ◽  
Neal R. Armstrong ◽  
John. Hayes
Keyword(s):  
Sol Gel ◽  
Planar Waveguides ◽  
Low Loss ◽  
Fabrication And Characterization

Structural and Spectroscopic Assessment of Er3+-Activated SiO2-HfO2 Glass Ceramics Planar Waveguides

2008 ◽  
Vol 55 ◽  
pp. 56-61
Author(s):  
L. Minati ◽  
Giorgio Speranza ◽  
Yoann Jestin ◽  
Cristina Armellini ◽  
Andrea Chiappini ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Spinodal Decomposition ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Emission Spectra ◽  
Planar Waveguides ◽  
Material Structure ◽  
Crystalline Environment ◽  
Concentration Threshold

Two series of xHfO2 - (100-x) SiO2 (x=10, 20, 30 mol%) glass-ceramics planar waveguides doped with 0.3 mol% Er3+ ions were prepared by the sol-gel route. A thermal treatment at 1000°C was applied to the second series of samples to nucleate HfO2 crystals. The waveguides were analyzed by X-ray photoelectron spectroscopy to study the effect of the Hf concentration and of the annealing on the material structure. XPS shows that in the first series of samples a Hf concentration threshold exists. Above this threshold the material undergoes a spinodal decomposition with formation of HfO2 rich domains. In the second series of samples the presence of thermal treatment lowers the concentration threshold so that the phase separation occurs also at a Hf concentration of 10%mol. In the waveguides where spinodal decomposition in present, the emission spectra from the Er3+ ions reveal a sensible narrowing of the 4I13/2 → 4I15/2 line. This demonstrates the presence of a crystalline environment for the Er3+ ions since the inhomogeneous broadening due to the disordered glassy network is suppressed. These results may have important implications for the fabrication of photonic devices with increased efficiency.

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