SECONDMENTS

At first, the program aims at selecting the best glass composition exhibiting intense magneto optical properties. The second part of the program is devoted to the structural, optical and magnetic properties characterization..

• Glass material synthesis with the good hosting ability for ions rare earth. Focus on the target properties such as high optical quality, chemical stability, high refractive index, and high nonlinear optical coefficient χ(3) and on the development of adapted glass and process technologies for mid-infrared transmission (heavy metal oxides 1-5.5µm).
• Carry out magneto-optical measurements, measuring the Verdet constants by the Faraday Effect of the samples synthesized in Bordeaux, at Prof. Dr. Marcelo Nalin’s lab, Laboratory of Special Glasses.

Novel borotunstate glass containing large amount of paramagnetic coupounds have been investigated. Strucural characterization have been conducted revealing the presence of WO6 and both BO3 and BO4 structural units. Optical and magnetic characterization evidenced the introduction of the rare earth ions in the glass network as paramagnetic species. The preliminary results on magneto-optical measurements for Terbium containing samples are very promising, being extremely close to the TGG single crystal, opening possibilities for future applications. Measurements with other rare earths also tend to be promising, due to the high Curie constant values.