Improved Sol-Gel Materials for Efficient Solid State Dye Lasers

1993 ◽  
Vol 329 ◽  
Author(s):  
Michael Canva ◽  
Patrick Georges ◽  
Jean-Fran^ois Perelgritz ◽  
Alain Brun ◽  
Fréddric Chaput ◽  
...  
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Room Temperature ◽  
Sol Gel ◽  
Tunable Lasers ◽  
Optical Quality ◽  
Dye Lasers ◽  
Laser Dyes ◽  
Host Matrix ◽  
Host Matrices

AbstractPhotoresistant laser dyes were trapped in silica based xerogel host matrices to obtain solid state tunable lasers. For this purpose very dense xerogel samples with improved chemical and physical properties were prepared at room temperature by the sol-gel technology. The as-prepared materials were polished to obtain optical quality surfaces and were used as new lasing media.Lasing action of such different dyes as rhodamine, perylene and pyrromethene doping dense sol-gel matrices was demonstrated. Efficiencies of 30 % or lifetimes of more than 100,000 shots were achieved with different new ≤dye dopant/host matrix≥ couples. Their different performances are reviewed and discussed.

Utilization of metallic Ag and Ag+ ions to optimize room-temperature TCR and MR of La0.7(Ca0.205Sr0.095)MnO3:xAg2O composites

2020 ◽  
Vol 8 (47) ◽  
pp. 17054-17064
Author(s):  
Hongjiang Li ◽  
Gang Dong ◽  
Kaili Chu ◽  
Xingrui Pu ◽  
Zhidong Li ◽  
...  
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Sol Gel ◽  
High Density

Herein, high-density La0.7(Ca0.205Sr0.095)MnO3:xAg2O composites (LCSMO:xA, 0.0 ≤ x ≤ 0.5) are successfully fabricated by using a combination of sol–gel and solid-state methods.

Solid-state tunable lasers based on dye-doped sol-gel materials

1990 ◽  
Author(s):  
Bruce S. Dunn ◽  
John D. Mackenzie ◽  
Jeffrey I. Zink ◽  
Oscar M. Stafsudd
Keyword(s):  
Solid State ◽  
Sol Gel ◽  
Tunable Lasers

Physical properties of La0.7Ca0.2Sr0.1MnO3 manganite: a comparison between sol–gel and solid state process

2016 ◽  
Vol 28 (4) ◽  
pp. 3648-3658 ◽  
Author(s):  
A. Ezaami ◽  
N. Ouled Nasser ◽  
W. Cheikhrouhou-Koubaa ◽  
M. Koubaa ◽  
A. Cheikhrouhou ◽  
...  
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Sol Gel ◽  
State Process

Preparation and Characterization of Epoxy-Silica Coatings Using Rhodamine 6G as Dye

2014 ◽  
Vol 1613 ◽  
pp. 45-51 ◽  
Author(s):  
J.L. Varela Caselis ◽  
R. Agustín Serrano ◽  
E. Rubio Rosas
Keyword(s):  
Epoxy Resin ◽  
Rhodamine 6G ◽  
Organic Dyes ◽  
Sol Gel ◽  
Optical Quality ◽  
Laser Dyes ◽  
High Optical Quality ◽  
Adhesion Properties ◽  
Silica Coatings ◽  
Glass Substrates

ABSTRACTIt has been found that the hybrid materials are a compatible matrix for numerous organic compounds, such as organic dyes, laser dyes, and compounds that exhibit photo-chromic behavior and many more The epoxy-silica system seems to be an excellent matrix for organic dyes and a hybrid material suitable for to be used as coating on glass substrates with good adhesion properties. This work presents a systematic study of the effects of the different amount of using rhodamine 6G as dye on the structure and properties of epoxy–silica hybrids coatings synthesized by the sol-gel process. We have taken advantage on the high solubility of organic dyes in a hybrid organic–inorganic epoxy resin–silica (epoxy–SiO2) matrix to obtain homogeneous, hard and high optical quality red color films on glass substrates. The effects of the content of rhodamine 6 G on the optical and thermal properties of epoxy-silica hybrid films were also examined. Epoxy resin DER 332 cured with an amine (4,4 diamino diphenyl methane) was used as organic component and tetraethyl orthosilicate (TEOS) was used as precursor of the inorganic component. The results showed that at a concentration of rhodamine 0.05% coatings retain adhesion properties similar to coatings without colorant and the coatings are uniform and free of defects. These coatings have the potential to be used as filters and ornamental coatings.

Synthesis, Structure, and Physical Properties of Hybrid Nanocomposites for Solid-State Dye Lasers

2005 ◽  
Vol 109 (46) ◽  
pp. 21618-21626 ◽  
Author(s):  
I. García-Moreno ◽  
A. Costela ◽  
A. Cuesta ◽  
O. García ◽  
D. del Agua ◽  
...  
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Hybrid Nanocomposites ◽  
Dye Lasers

Optical Properties of Nanostructured Sol–Gel Thin Films Doped with Fe2O3 and Their Ferromagnetic Characterization by Mössbauer Spectroscopy

2008 ◽  
Vol 8 (12) ◽  
pp. 6491-6496
Author(s):  
Jorge Garcia-Macedo ◽  
Guadalupe Valverde-Aguilar ◽  
Raúl W. Gómez ◽  
José L. Pérez-Mazariego ◽  
Vivianne Marquina
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Sol Gel ◽  
Dip Coating ◽  
Optical Quality ◽  
X Ray Diffraction ◽  
Glass Substrates ◽  
Coating Method ◽  
Dip Coating Method

Sol–gel thin films containing Fe2O3 were deposited onto glass substrates by the dip-coating method at room temperature. Fe2O3 enriched with the isotope 57Fe was embedded in two kinds of matrices: zinc oxide (ZnO) and silica (SiO2). X-ray diffraction (XRD) was used for morphology and structure determination of the nanostructures and showed that the ZnO exhibit a wurtzite form when the film is annealed at 450 °C for 20 min. SiO2 thin films at C16H33PEO20:Fe2O3 = 1:2.7 × 10−1 molar concentration exhibit a hexagonal nanophase produced by the diblock copolymer Brij58 (C16H33PEO20). Optical absorption and infrared spectroscopy techniques were used to evaluate the optical quality of the films. In order to determine if the Fe2O3 was incorporated into the matrices, room temperature Mössbauer spectra of both samples were obtained. In both cases the hematite spectrum was obtained, corroborating that the incorporation of the Fe2O3 to the matrices was done without chemical reaction whatsoever.

scholarly journals Photo-Physical Properties of Stilbine-3 (STB-3) Laser Dyes Embedded in Sol-Gel Glasses

2016 ◽  
Vol 06 (04) ◽  
pp. 64-74
Author(s):  
Laxman V. Jathar ◽  
Dilip G. Achalawat ◽  
Jayraj R. Rane ◽  
Aparna V. Deshpande ◽  
Shaila M. Wagle
Keyword(s):  
Physical Properties ◽  
Sol Gel ◽  
Laser Dyes ◽  
Gel Glasses

scholarly journals The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 361
Author(s):  
Lik Nguong Lau ◽  
Kean Pah Lim ◽  
Amirah Natasha Ishak ◽  
Mohd Mustafa Awang Kechik ◽  
Soo Kien Chen ◽  
...  
Keyword(s):  
Grain Size ◽  
Solid State ◽  
Physical Properties ◽  
Solid State Reaction ◽  
Electrical Transport ◽  
Colossal Magnetoresistance ◽  
Structure Refinement ◽  
Sol Gel ◽  
Research Work ◽  
Scattering Process

La0.7Sr0.3MnO3 (LSMO) and Nd0.7Sr0.3MnO3 (NSMO) possess excellent colossal magnetoresistance (CMR). However, research work on the neodymium-based system is limited to date. A comparative study between LSMO and NSMO prepared by sol–gel and solid-state reaction methods was undertaken to assess their structural, microstructural, magnetic, electrical, and magneto-transport properties. X-ray diffraction and structure refinement showed the formation of a single-phase composition. Sol–gel-synthesised NSMO was revealed to be a sample with single crystallite grains and exhibited intriguing magnetic and electrical transport behaviours. Magnetic characterisation highlighted that Curie temperature (TC) decreases with the grain size. Strong suppression of the metal–insulator transition temperature (TMI) was observed and attributed to the magnetically disordered grain surface and distortion of the MnO6 octahedra. The electrical resistivity in the metallic region was fitted with theoretical models, and the conduction mechanism could be explained by the grain/domain boundary, electron–electron, and electron–magnon scattering process. The increase in the scattering process was ascribed to the morphology changes. Enhancement of low-field magnetoresistance (LFMR) was observed in nano-grained samples. The obtained results show that the grain size and its distribution, as well as the crystallite formation, strongly affect the physical properties of hole-doped manganites.

The use of high-resolution FESEM to study solid-state phase transformations and reactions

1994 ◽  
Vol 52 ◽  
pp. 1028-1029
Author(s):  
P. G. Kotula ◽  
D. D. Erickson ◽  
C. B. Carter
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Phase Transformations ◽  
High Efficiency ◽  
Sol Gel ◽  
Quantitative Information ◽  
Solid State Reactions ◽  
Critical Dimensions ◽  
Backscattered Electrons ◽  
Backscattered Electron

High-resolution field-emission-gun scanning electron microscopy (FESEM) has recently emerged as an extremely powerful method for characterizing the micro- or nanostructure of materials. The development of high efficiency backscattered-electron detectors has increased the resolution attainable with backscattered-electrons to almost that attainable with secondary-electrons. This increased resolution allows backscattered-electron imaging to be utilized to study materials once possible only by TEM. In addition to providing quantitative information, such as critical dimensions, SEM is more statistically representative. That is, the amount of material that can be sampled with SEM for a given measurement is many orders of magnitude greater than that with TEM.In the present work, a Hitachi S-900 FESEM (operating at 5kV) equipped with a high-resolution backscattered electron detector, has been used to study the α-Fe2O3 enhanced or seeded solid-state phase transformations of sol-gel alumina and solid-state reactions in the NiO/α-Al2O3 system. In both cases, a thin-film cross-section approach has been developed to facilitate the investigation. Specifically, the FESEM allows transformed- or reaction-layer thicknesses along interfaces that are millimeters in length to be measured with a resolution of better than 10nm.

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