Past Events

Giornata Internazionale della Luce

posted May 21, 2019, 12:08 AM by Stefano Varas   [ updated May 21, 2019, 2:19 AM ]

Sala Grande FBK, Via Santa Croce 77, Trento
dalle ore 8:45 alle ore 13:15

La luce è vita e come tale plasma le nostre vite e la nostra storia. Cinque scienziati provenienti da differenti aree del sapere e della società civile discuteranno su:

  • Il vetro, la sfera e la luce: dalla lente al microlaser
  • Luce e orticoltura
  • La luce al servizio della medicina: i biosensori ottici
  • Luce - Ricerca e tradizione culturale
  • Luce e ontologia: visione artificiale e metodo geometrico

Presentazioni IDL2019

   Open Presentazioni IDL2019 in Google Drive

Giornata Internazionale della Luce 2019, Photo Gallery

Grande finale del progetto europeo “Phablab 4.0”

posted Apr 10, 2019, 3:19 AM by Stefano Varas   [ updated Apr 16, 2019, 5:54 AM ]

Si è tenuto ieri presso il MuSe l’evento finale del progetto europeo Phablab 4.0, svolto in collaborazione con tra CNR-IFN ed il Muse FabLab che ha visto sfidarsi 7 progetti candidati alla Photonics Challenge 2019.

Quattro i criteri di valutazione: Originalità, Tecnologia, Design, Comunicazione. A fare da controcanto alle scelte dei giudici la giuria popolare che, al termine delle presentazioni, potrà confermare il giudizio dei giudici o ribaltarne il risultato, eleggendo il candidato più comunicativo.

Il premio della giuria è stato assegnato al progetto M&L Pocket presentato da Pietro Degapseri.

Photonics Challenge 2019, Photo Gallery

Lam Thi Ngoc Tran - Doctorate in Civil, Environmental and Mechanical Engineering 2019

posted Apr 9, 2019, 6:55 AM by Stefano Varas   [ updated Apr 9, 2019, 6:57 AM ]

We are pleased to congratulate with our colleague Dr. Lam Thi Ngoc Tran on successfully obtaining her PhD degree in Civil, Environmental and Mechanical Engineering with the qualification "Excellent cum Laude"

Photos: Lam Thi Ngoc Tran - PhD degree in Civil, Environmental and Mechanical Engineering 09-04-2019

Seminar Announcement: Ambra Giannetti

posted Apr 5, 2019, 3:48 AM by Stefano Varas   [ updated Apr 5, 2019, 3:48 AM ]

Thursday, 4 April 2019, 15:00
Sala Grande Palazzina B via alla Cascata 56/C

"Label-based and Label-free Optical Biosensors"

Ambra Giannetti
Via Madonna del Piano 10,
50019 Sesto Fiorentino (FI),

The field of bio-sensors, ranging from biomedical/clinical applications to environmental applications and food analyses, has attracted a great attention since the past two decades. In fact, in all of these fields, there is a growing demand for rapid responses, quality control, usable devices, low-cost analyses, etc. All these features could lead to an improved healthy life, ranging from a more reliable and controlled quality of food and environment to a faster and more specific diagnosis. The optical detection methods used in bio-sensors are based both on label-based or label-free techniques. This seminar will focus on new optical (label-free and label-based) bio-sensor studies developed at the Institute of Applied Phisics – CNR, Florence.

Seminar Announcement: Tatsuya Mori

posted Mar 24, 2019, 12:20 PM by Stefano Varas   [ updated Mar 24, 2019, 12:20 PM ]

Thursday, 21 March 2019, 15:00
Sala Grande Palazzina B via alla Cascata 56/C

"Boson peak and fracton in glass and single crystal probed by terahertz spectroscopy"

Tatsuya Mori
Division of Materials Science Faculty of Pure and Applied Sciences,
University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8573,

In disordered materials, the boson peak (BP) is observed in the terahertz region as a universal feature of atomic vibration [1]. The BP closely relates to the universal temperature behavior of thermal properties of glassy system which is one of the unsolved problems in glass physics. Meanwhile, for polymer glass, the so-called fracton [2] excitation will universally appear in the frequency range above the BP frequency, and it will be originated from the self-similar connectivity of structural units. Interestingly, some particular single crystals such as some thermoelectric materials [3,5] and pure relaxor materials [6], show the universal temperature dependence of thermal properties of glassy system. Those anomalous thermal properties are originated from the off-center rattling phonon modes which correspond to the BP of actual glassy materials [5]. In addition, the fracton in single crystal is observed in the pure relaxors [4,7], by the connection of the dipole-dipole moments having a fractal structure. In the presentation, we show how to detect these universal excitations by terahertz spectroscopy [8] and discuss the difference of behaviors of BP and fracton between actual glass materials and single crystals.

Seminar Announcement: Trevor Benson

posted Mar 5, 2019, 10:40 AM by Stefano Varas   [ updated Mar 5, 2019, 10:40 AM ]

Tuesday, 26 February 2019, 10:30
Sala Grande Palazzina B via alla Cascata 56/C

"Assessing the optical properties of chalcogenide glasses at mid-infrared (MIR) wavelengths"

Trevor Benson
George Green Institute for Electromagnetics Research, Faculty of Engineering,
University of Nottingham, University Park, Nottingham, NG7 2RD,
United Kingdom

Abstract Refractive index dispersion is one of the critical parameters that influences the design of optical components. Prism measurements in our laboratory can determine the mid-infrared refractive index of chalcogenide glasses to a standard deviation of precision of less than 0.002. However, shortcomings of this technique are that it requires multiple light sources and intensive sample preparation. The modelling of transmission spectroscopic data [1] is an attractive alternative and was extended by us into the mid-infrared (MIR) region by introducing a two- term Sellmeier equation [2]. This approach determines the refractive index dispersion of chalcogenide glasses to an accuracy of better than 0.4 %. The presentation we will review this method, and discuss its recent extensions to determining very small refractive index contrast and the evaluation of thermo-optic coefficients.

Damiano Massella - La fisica per tutti

posted Jan 30, 2019, 1:21 AM by Stefano Varas   [ updated Jan 30, 2019, 1:23 AM ]

Seminar Announcement: Riccardo Mincigrucci

posted Jan 30, 2019, 12:26 AM by Stefano Varas

Tuesday, 29 January 2019, 10:30
Sala Grande Palazzina B via alla Cascata 56/C

"An introduction to FERMI : the Italian free electron laser"

Riccardo Mincigrucci
Elettra Sinctrotrone Trieste SCpA, Strada Statale 14 - km 163, 5, 34149, Basovizza,
Trieste, Italy

The continuous development of new light sources in the recent past was mainly driven by free electron lasers (FELs): a technology that extends the laser concept in a region spanning from the EUV to the x-rays. FERMI, located in the Elettra Sincrotrone Trieste campus, distinguish itself in FEL panorama working in a seeded configuration that confer exceptional properties in terms of stability and coherence. Four beamlines are fully operative and two more are in an advanced sate of commissioning. An introduction to the characteristics and capabilities of FERMI will be presented during the talk alongside with some recent experimental results obtained by the beamlines.

Seminar Announcement: Simone Normani

posted Dec 20, 2018, 7:56 AM by Stefano Varas   [ updated Dec 20, 2018, 7:57 AM ]

Thursday, 20 December 2018, 15:00
Sala Grande Palazzina B via alla Cascata 56/C

"Er3+-doped Ga-Ge-Sb-S glass PVD: A comparative study of sputtered and PLD thin films"

Simone Normani
University of Pardubice, Department of Graphic Arts and Photophysics,
Pardubický, Czech Republic

Despite the renewed interest in rare earth-doped chalcogenide glasses that lies mainly in mid-IR applications, only few comprehensive studies so far have presented the photoluminescence of amorphous chalcogenide films from visible to mid-IR. This study reports the fabrication of luminescent PVD quaternary chalcogenide thin films using RF-sputtering and PLD and their characterization via EDS, SEM, XPS, Raman spectroscopy, AFM and ellipsometry. Several Er3+ emission bands from visible to mid-infrared were clearly observed in the PVD films. The study of 4I13/2 level lifetimes enables development of suitable deposition parameters. The variation in surface roughness is limited, which ensures reasonable optical losses (0.7-0.9 dB/cm). Mid-IR photoluminescence from Er3+- doped micro-waveguide was demonstrated at ~2.76 µm. Finally, the effects of annealing on the chalcogenide films spectroscopy and lifetimes were assessed. The luminescence from the visible to mid-IR generated using erbium doped chalcogenide wave-guiding micro-structures might find easy-to-use applications concerning telecommunication technologies or on-chip optical sensors for which luminescent sources or amplifiers operating at different wavelengths are required.

Seminar Announcement: Mariola Ramirez

posted Dec 5, 2018, 12:23 AM by Stefano Varas   [ updated Dec 5, 2018, 12:23 AM ]

Wednesday, 5 December 2018, 15:00
Sala Grande Palazzina B via alla Cascata 56/C

"Interaction between localized surface plasmons and nonlinear solid state gain media"

Mariola Ramirez
Departamento Física de Materiales,
Universidad Autónoma de Madrid

Noble metal nanostructures offers a promising perspective for the development of new photonic devices due to their ability to manipulate light in the nano-scale. Their extraordinary capability to couple light with collective oscillations of their conduction-band electrons results in a strong confinement of the electromagnetic energy in the surroundings of the metallic nanostructures. This feature can be used to enhance the interactions between the far-field light and optical emitters placed in close proximity to the metallic nanostructures.
In this context, different arrangements of silver nanoparticles formed on the surfaces of optically active ferroelectric crystals have shown their capability to obtain two types of optical radiation sources with improved performances at the nanoscale: i) Plasmon-assisted Nd3+-based solid state lasers and ii) Plasmon- enhanced Second Harmonic Generation. The mechanisms responsible for the intensification of the radiation–matter interaction processes by localized surface plasmon resonances are analyzed in each case.

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