Papers by Author: Elisabetta Borsella

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Authors: F. Enrichi, G. Mattei, C. Sada, E. Trave, Elisabetta Borsella, D. Pacifici, G. Franzò, F. Priolo, F. Iacona, M. Prassas
Abstract: The incorporation of Si-nc in Er doped silica is known to strongly enhance the infrared luminescence of Er3+ at 1.54µm. The enhancement is believed to be due to an energy transfer process from Si-nc to Er. In this work we investigate the formation of Si nano-aggregates and their role in the energy transfer process to Er3+ ions for a multi-component glass host. These materials can offer better performances than silica in terms of Er solubility and band broadness for integrated Er-doped optical amplifiers and investigation is therefore very interesting for optoelectronic applications. Si and Er were co-implanted by choosing the implantation energies in order to optimize the overlap between the concentration profiles. The precipitation of Si and the enhancement of the 1.54 µm Er emission were studied for different post-implantation annealing temperatures. In particular the optical properties of the glass were investigated by means of photoluminescence (PL) spectroscopy and the results are discussed in relation to a standard silica substrate. These data are presented and related to the structural properties of the material. Moreover the implications on the future development of an Er doped optical amplifier are discussed.
Authors: Elisabetta Borsella, S. Botti, S. Martelli
Authors: Elisabetta Borsella, S. Botti, S. Martelli, R.M. Montereali, W. Vogel, E. Carlino
Authors: Elisabetta Borsella
Abstract: The paper presents a review of the results of the synthesis and characterization of Si nanoclusters and Er co-doped glasses for optical amplifiers obtained in the framework of the EC IST-SINERGIA Project.
Authors: F. Fabbri, Elisabetta Borsella, M. Carpanese, Roberta Fantoni, R. Caterino, Rosaria D'Amato, Mauro Falconieri, Emanuele Serra
Abstract: Si-nanoparticles (NP) are attracting steadily growing interest due to their intriguing sizedependent optical properties. The most challenging task in preparing Si-NP is to succeed in controlling the particle size and size distribution and the surface properties. To this respect, the method of laser synthesis of Si-NP from gas phase reactants appears as an ideal tool, being a very versatile and controllable synthesis technique, but the collected Si-NP are strongly agglomerated. Here we report on attempts to decrease the agglomeration of the Si NP by following two complementary strategies: - investigation and control of nanoparticle formation and growth during the synthesis process; - dispersion of the agglomerates and termination of the particle surfaces by controlled chemical etching followed by surface passivation and stabilization treatments. The properties of as-prepared and processed Si NP will be presented and discussed.
Authors: Elisabetta Borsella, S. Botti, M.C. Cesile, Paolo Emilio di Nunzio, S. Martelli, A. Nesterenko
Authors: Elisabetta Borsella, S. Botti, M.C. Cesile, S. Martelli, A. Nesterenko
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