Erbium activated HfO2 based glass–ceramics waveguides for photonics |
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| Institution: | 1. CNR-IFN, Istituto di Fotonica e Nanotecnologie, CSMFO group, via Sommarive 14, 38050 Povo-Trento, Italy;2. Dipartimento di Fisica, Università di Trento, CSMFO group, via Sommarive 14, 38050 Povo-Trento, Italy;3. CNR-IFAC Istituto di Fisica Applicata, ‘Nello Carrara’, Optoelectronics and Photonics Department, via Panciatichi 64, 50127 Firenze, Italy;4. Laboratoire CRISMAT, UMR 6508, ENSICAEN 6 boulevard Maréchal Juin 14050 Caen cedex 4, France;5. CNR, Department of Materials and Devices, via dei Taurini 19, 00185 Roma, Italy;6. ITC-IRST, via Sommarive 18, 38050 Povo-Trento, Italy |
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| Abstract: | (100 ? x)SiO2 ? xHfO2 (x = 10, 20, 30 mol) glass–ceramics planar waveguides activated by 0.3 mol% Er3+ ions were prepared by sol–gel route, using dip-coating deposition on v-SiO2 substrates. High resolution transmission electron microscopy has shown that after an adapted heat treatment, the resulting materials show nanocrystalline structures. The glass–ceramics waveguides were characterized by m-line, Raman, losses measurements, and photoluminescence spectroscopy. Photoluminescence spectroscopy has demonstrated the embedding of erbium ions in the nanocrystals. The results are discussed with the aim of assessing the role of hafnia on the structural, optical and spectroscopic properties of erbium doped silica hafnia glass–ceramics planar waveguides. |
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