Design of photonic structures by sol–gel-derived silica nanospheres |
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| Affiliation: | 1. Dipartimento di Fisica, CSMFO group, Università di Trento, via Sommarive 14, 38050 Povo-Trento, Italy;2. CNR-IFN, Istituto di Fotonica e Nanotecnologie, CSMFO group, via Sommarive 14, 38050 Povo-Trento, Italy;3. CNR-IFAC, Optoelectronics and Photonics Department, Via Madonna del Piano 10, 50019, Sesto Fiorentino (Firenze), Italy;4. CNR, Department of Materials and Devices, via dei Taurini 19, 00185 Roma, Italy;5. Depart. Eng. de Materiais/ICEMS, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal |
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| Abstract: | ![]()
Sol–gel processing was used to obtain monosized silica spheres of 270 nm in diameter. Starting from these spheres, two different systems have been fabricated: (i) 3D Photonic Crystals by means of vertical deposition and evaporation-assisted sedimentation deposition methods; (ii) core-shell-like Er3+-activated silica spheres, where the core is the silica sphere and the shell is an Er2O3–SiO2 coating. Optical and spectroscopic assessment, as well as morphological and structural characterization of the systems, have been performed. |
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