Tin dioxide nanocrystals as $Er^{3+}$ luminescence sensitizers ---Characterization of the system.

Zur L., Tran L.T.N., Derkowska-Zielinska B., Vaccari A., Boucher Y., Chiasera A., Varas S., Tran T.T.V., Lukowiak A., Pisarski W.A., Shivakiran Bhaktha B.N., Zonta D., Ramponi R., Righini G.C., Ferrari M.

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We present a sol-gel silica tin dioxide glass-ceramics system doped with $Er^{3+}$. The energy transfer from the $SnO_{2}$ nanocrystals to the RE ions was proved by experiments and the results were clarified by the simulations on the structure and the band structure of the discussed system. Following the characterization of tin-dioxide--based thin films, monoliths and planar waveguides have been fabricated and characterized for further processing into photonic devices. This research is performed in the framework of the projects COST MP1401 (2014--2018), Centro Fermi PLANS and MAECI PLESC. Tran acknowledges the scholarship of the Ministry of Education and Training from Vietnam.

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