Past Events

OSA Reviewer Certification Course - Osman Sayginer

posted Mar 25, 2020, 9:30 AM by Stefano Varas   [ updated Mar 25, 2020, 9:38 AM ]

We are pleased to congratulate with our colleague Osman Sayginer, who successfully completed the OSA Reviewer Certification Course.

Lidia Zur

posted Jan 13, 2020, 3:50 AM by Stefano Varas   [ updated Jan 13, 2020, 3:53 AM ]

Dear Lidia, we are indebted with you for the outstanding scientific contribution to IFN Trento.
We wish you an exciting life and a well deserved career.
Your Friends

link to photos

Seminar Announcement: Mathias Wickleder

posted Nov 19, 2019, 5:53 AM by Stefano Varas   [ updated Nov 19, 2019, 5:53 AM ]

Friday, 15 November 2019, 15:00
Sala Grande Palazzina B via alla Cascata 56/C

"Precursors for Rare Earth Oxides - New Routes to ultrathin Oxide Layers"

Mathias Wickleder
Department of Chemistry,
University of Cologne,

Rare earth oxides have attracted considerable attention as so called high-k materials. These compounds exhibit very high dielectric constants that are mandatory for further miniaturization of electronic devices. Especially for field effect transistors ther e is strong need for ultrathin films of high-k oxides on silicon surfaces. There are several methods to produce these layers, like atomic layer deposition (ALD) and chemical vapor deposition (CVD). Our research is directed to the development of a more simp le process that allows for the preparation of thin carbon-and-chlorine-free layers. Following these aims we are investigating m olecular nitrates and perchlorates according to the general formula M(NO3)3·xL and M(ClO4)3·xL, where M is a rare earth metal an d xL is a variable number of solvent ligands. These compounds usually show the M3+ ions coordinated by three chelating nitrate groups and the solvent molecules leading to high coordination numbers We used the DME compound La(NO3)3·2DME as a precursor for the deposition of La2O3 on H-terminated silicon surfaces. It turned out that the simple procedure leads to La2O3 layers with a thickness below 10 nm.

Seminar Announcement: Claudia Wickleder

posted Nov 15, 2019, 2:36 AM by Stefano Varas   [ updated Nov 15, 2019, 2:36 AM ]

Friday, 15 November 2019, 10:00
Sala Grande Palazzina B via alla Cascata 56/C

"Light - Lamps - Luminescence - from basic research to applications"

Claudia Wickleder
School of Science and Technology University of Siegen,

The development of new optical materials is currently a hot topic also with respect of energy saving purposes. In fact this is shown by the drastic change in lightening techniques in Europe, changing from incandescent lamps over discharge lamps to modern LEDs, which energy balance is improved compared to former lamps. However, the development of suitable materials for these applications is necessary. In this presentation, promising candidates in this context with very high efficiencies, suitable emission energies and low excitation energies, which are crucial for energy saving will be introduced. Furthermore, some respective nanoparticles will be presented which are useful for applications as medical markers or to investigate the toxicity of nanoparticles.

Seminar Announcement: Charlotte Hurel

posted Oct 29, 2019, 7:01 AM by Stefano Varas   [ updated Oct 29, 2019, 7:02 AM ]

Tuesday, 29 October 2019, 10:00
Sala Grande Palazzina B via alla Cascata 56/C

"Adsorption and magnetic filtration of pollutants by a biochar-based composite"

Charlotte Hurel
Université Côte d'Azur,
INФNI, Laboratoire de Radiochimie, Sciences Analytiques et Environnement (LRSAE),
CNRS, Institute of Chemistry of Nice,
Nice, France

Biochar, defined as the carbon residue obtained from the thermal decomposition of biomass, can be used for a wide variety of applications, such as soil amendment, adsorption for water and air pollutants, catalysis, electronic industry or hydrogen storage. For the removal of pollutants from water, the association of biochar with magnetic particles inside a composite material enables the sorbent to be easily separated by magnetic filtration from the decontaminated water after the adsorption step [1]. In this work, the chemical and physical properties of a magnetic biochar obtained from a biorefinery residue have been investigated, with the association of a classical sorption study to a physical study for the understanding and optimization of the magnetic separation.

Seminar Announcement: Franck Mady

posted Oct 28, 2019, 4:21 AM by Stefano Varas   [ updated Oct 28, 2019, 4:21 AM ]

Monday, 28 October 2019, 10:00
Sala Grande Palazzina B via alla Cascata 56/C

"Specific mechanisms associated with rare earth dopants (Yb, Er, Ce) in the radiation induced attenuation of silica based optical fibers"

Franck Mady
Université Côte d'Azur, INФNI, Laboratoire de Radieochimie,
Sciences Analytiques et Environnement (LRSAE),
Parc Valrose 06108 Nice, Cedex 2,

We report on an original approach enabling an in depth investigation of the mechanisms of the radiation induced attenuation (RIA) development and annealing in silica based fiber preforms [1]. The experim ental protocol combines temperature and spectrally resolved TSL measurements with the characterization of the RIA annealing in TSL conditions. TSL allows the identification of those dopant or defect related centers that trap free carriers under irradiati on to form color centers (responsible for RIA) and that are restored by recombination during the thermal annealing induced by the TSL readout. The simultaneous monitoring of the RIA bleaching reveals correlations between these reformation processes and the recovery of radiation induced optical absorption bands attributed to well known color centers. Such correlations bring decisive indications on RIA mechanisms.
Our protocol is applied in a systematic manner to silicate, aluminosilicate, Yb doped silicate, Er doped silicate, Yb doped and Yb,Ce codoped aluminosilicate preform samples to elucidate the role played by each dopant.

Giornata della FOTONICA - 21 ottobre 2019

posted Oct 22, 2019, 5:41 AM by Stefano Varas   [ updated Nov 7, 2019, 2:06 AM ]

Sala Grande FBK, Via Santa Croce 77, Trento
dalle ore 14:00 alle ore 19:00

Il 21 ottobre è il giorno della fotonica. Scienziati provenienti da differenti aree del sapere e della società civile discuteranno di FOTONICA, la scienza che ti rende possibile aver il tuo smartphone, l’illuminazione in casa, le attrezzature sanitarie che ti salvano la vita e molto altro.

  • Luce, Sfera, Vetro: dall’ottica alla fotonica
  • Luce e orticoltura
  • Ontologia applicata: niente è invisibile come la luce
  • Giovani fotonici crescono: Comunicazione dei vincitori del concorso tra le scuole ed interventi da parte delle Scuole
  • Lavorazioni laser industriali dei materiali. Trend, ricerca, mercato
  • Luce e vetro: radiazione solare e protezione passiva e la generazione di elettricità da vetrate semitrasparenti.
  • La luce al servizio della medicina: i biosensori ottici
  • Luce - Ricerca e tradizione culturale


Presentazioni Giornata della Fotonica 2019

   Open Presentazioni Giornata della Fotonica 2019 in Google Drive

Photo Gallery, Giornata della FOTONICA 2019

Seminar Announcement: Alexander Quandt

posted Oct 15, 2019, 7:58 AM by Stefano Varas   [ updated Oct 15, 2019, 7:58 AM ]

Tuesday, 15 October 2019, 15:00
Sala Grande Palazzina C via alla Cascata 56/C

"Computational Photonics and Topological Materials"

Alexander Quandt
University of the Witwatersrand,
WITS University 1 Jan Smuts Avenue Braamfontein 2000,
South Africa

In recent years it became clear that many photonic structures show interesting topological properties, which had simply been overlooked in the past. I will give an introduction into this fascinating topic and discuss various examples like topological photonic crystals and topological waveguide arrays. My focus will be on an elementar y discussion of the main results, where I will slightly deviate from the standard approaches and show how to apply rather intuitive concepts like the Brouwer degree, instead of falling back on more abstract mathematical concepts. Finally, I will discuss so me of the numerical approaches used to study topological photonic systems.

Seminar Announcement: Wilfried Blanc

posted Oct 4, 2019, 2:12 AM by Stefano Varas   [ updated Oct 4, 2019, 2:12 AM ]

Wednesday, 2 October 2019, 15:30
Sala Grande Palazzina B via alla Cascata 56/C

"Light scattering in nanoparticles doped optical fibers, an opportunity"

Wilfried Blanc
Université Côte d'Azur, CNRS INPHYNI,
UMR 7010 Parc Valrose 06100 Nice,

Distributed sensing, based on Rayleigh scattering or arrays of reflectors, can be extended as a multi-fiber, multi-sensor technique by using multiplexing features. Current research has overcome the time-and wavelength-division multiplexing, that has represented the golden standard for fiber Bragg gratings. During this presentation, we introduce a novel domain that allows “parallel” multiplexing applied to distributed sensors, and are routed in the use of specialty fibers. The use of nanoparticles doped optical fibers enables new domains for multiplexing, that are discussed during this presentation. Scattering-level, polarization, and sensitivity-based multiplexing are discussed and applied to strain, temperature, 3D-shape and refractive index measurements.

Seminar Announcement: Wilfried Blanc

posted Oct 4, 2019, 2:11 AM by Stefano Varas   [ updated Oct 4, 2019, 2:11 AM ]

Tuesday, 1 October 2019, 10:30
Sala Grande Palazzina C via alla Cascata 56/C

"Light scattering in nanoparticles doped optical fibers, an issues"

Wilfried Blanc
Université Côte d'Azur, CNRS INPHYNI,
UMR 7010 Parc Valrose 06100 Nice,

The successes of glass photonics are many, with a large spectrum of applications covering Information and Communication Technology, Health and Biology, Structural Engineering, and Environment Monitoring Systems, etc. A paradigmatic example is the development of the Erbium-Doped Fiber Amplifier (EDFA) allowing the raise of optical telecommunications and high-speed internet. Silica glass is the most common glass used for photonics applications. However, certain of its characteristics may be detrimental for luminescence properties (low rare-earth solubility, high phonon energy, etc). To overcome these limitations, the use of nanoparticles in optical waveguides is gaining large interest in modern photonic technology. Such waveguides would combine the advantages of silica (transparency, cost, chemical and mechanical durability, etc.) and the specific properties provided by the nanoparticles which encapsulate the rare-earth ions. During this presentation, we will discuss on the opportunities offer for lasers and amplifiers thanks to the engineering of the spectroscopic properties and the management of nanoparticlesinduced light scattering.

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