A. Ficorella
A5073149893- Advanced Optical Sensing Technologies
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Quantum Dots Synthesis And Properties
- Particle Detector Development and Performance
- Ocular and Laser Science Research
- Dark Matter and Cosmic Phenomena
- Analytical Chemistry and Sensors
- Chalcogenide Semiconductor Thin Films
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
- Particle physics theoretical and experimental studies
- Nuclear Physics and Applications
- Methane Hydrates and Related Phenomena
- Carbon and Quantum Dots Applications
- Metamaterials and Metasurfaces Applications
- Electrochemical sensors and biosensors
- Ga2O3 and related materials
- Perovskite Materials and Applications
- Luminescence Properties of Advanced Materials
- Nonlinear Optical Materials Studies
- Advanced Antenna and Metasurface Technologies
- Radioactive contamination and transfer
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Semiconductor Detectors and Materials
Fondazione Bruno Kessler
2020-2024
University of Trento
2016-2020
Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications
2016-2020
University of Rome Tor Vergata
2015
Metasurfaces and, in particular, metalenses have attracted large interest and enabled various applications the near-infrared THz regions of spectrum. However, metalens design visible range stays quite challenging due to smaller nanostructuring scale limited choice lossless CMOS-compatible materials. We develop a simple yet efficient polarization-independent, broadband suitable for many fabrication techniques materials implement it spectral using niobium pentoxide (Nb2O5). The produced...
This paper presents the first experimental demonstration of a pixelated two-layer Geiger-mode avalanche sensor designed for direct detection charged particles. In proposed device, each pixel is formed by two vertically aligned detectors, exploiting coincidence between simultaneous events to discriminate particles and dark counts. A 48 × 16 array has been fabricated in 150-nm CMOS process integrated through bump bonding. The pixel, that includes passive quenching, comparator, digital...
Single-photon avalanche diode (SPAD) arrays fabricated in a 180-nm CMOS technology with high-voltage option have been exposed to calibrated neutron and X-ray sources evaluate their radiation tolerance. The is being investigated view of the design low material budget detectors for charged particle tracking based on coincidence signals coming from two or more overlapping layers SPAD sensors. Each element array monolithic detector including processing electronics together same substrate....
Optical crosstalk is one of the main factors limiting performance Single-Photon Avalanche Diode (SPAD) arrays and Silicon Photomultipliers (SiPMs). In this paper, a set measurements on CMOS SPAD pixel array with 50µm × 75µm pitch 51.6% Fill Factor, designed for direct particle detection, reported. Measurements were performed dies different thickness: 280µm, 25µm. The dependence excess bias voltage distance between pairs pixels presented its overall effect Dark Count Rate (DCR) distribution...
In scintillation and dosimetry applications, the increasing interest on use of colloidal quantum dots (QDs) in comparison with organic fluorophores is mainly due to their easier chemical processability, narrower photoluminescence (PL) emission, higher cross-section for ionizing radiation. The development scintillators dosimeter based QDs, however, relies a deep understanding effects radiation QD structures. this paper, we present optical characterization cadmium-free InGaP/ZnS core–shell QDs...
In this paper, a complete optical crosstalk characterization of Geiger-mode pixelated avalanche detector for particle tracking application is presented. The device composed two tiers CMOS-integrated detectors bump bonded with pixel-level interconnects, each layer containing 16 × 48 array. On-chip coincidence detection circuits, designed to discriminate between particle-triggered events and dark counts, have been used acquire direct measurements. Crosstalk measurements as function excess bias...
Single-photon avalanche diodes (SPADs) fabricated using two different CMOS technologies were exposed to a neutron source up maximum fluence of 3 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sup> 1-MeV equivalent cm xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> . Significant changes in the dark count rate (DCR), with strong dependence on and device active area, detected after irradiation. A model for probability DCR degradation,...
The aim of this work is to perform preliminaries studies evaluate an optical sensor system for glucose detection in solution, order provide suitable indications develop a device non invasive glycaemia continuous monitoring. In study experimental set-up consisting LED-Photodiode couple has been tested as sensor. LED's emission partially absorbed by the solution and photodiode output voltage correlates with concentration solution. water placed into cuvettes spectrophotometric analysis, ranged...
Abstract In this paper, evidence that the increased response of SiPM sensors to passage charged particles is related mainly Cherenkov light produced in protection layer reported. The and timing properties with different layers have been studied.
Dark count rate (DCR) increase in CMOS single-photon avalanche diodes (SPADs) exposed to a nonmonochromatic neutron source is modeled, taking into accountthe spectrum and the geometry of device under test. Experimental results from characterization SPADs fabricated 150-nm technology irradiated with 1-MeV equivalent fluences up 1011 cm-2 are found be good agreement theoretically calculated distribution nonionizing energy deposited substrate.
Experiments aimed at direct searches for WIMP dark matter require highly effective reduction of backgrounds and control any residual radioactive contamination. In particular, neutrons interacting with atomic nuclei represent an important class due to the expected similarity a WIMP-nucleon interaction, so that such experiments often feature dedicated neutron detector surrounding active target volume. context development DarkSide-20k INFN Gran Sasso National Laboratory (LNGS), several R&D...
The dual-phase liquid argon time projection chamber is presently one of the leading technologies to search for dark matter particles with masses below 10 GeV/c$^2$. This was demonstrated by DarkSide-50 experiment approximately 50 kg low-radioactivity as target material. next generation DarkSide-20k, currently under construction, will use 1,000 times more and expected start operation in 2027. Based on experience, here we assess DarkSide-20k sensitivity models predicting light particles,...
The dual-phase liquid argon time projection chamber is presently one of the leading technologies to search for dark matter particles with masses below 10 GeV c−2. This was demonstrated by DarkSide-50 experiment approximately 50 kg low-radioactivity as target material. next generation DarkSide-20k, currently under construction, will use 1,000 times more and expected start operation in 2027. Based on experience, here we assess DarkSide-20k sensitivity models predicting light particles,...
We report on a scintillator-based online detection system for the spectral characterization of polychromatic proton bunches. Using up to nine stacked layers radiation hard polysiloxane scintillators, coupled and readout edge-on by large area pixelated CMOS detector, impinging bunches were characterized. The energy spectra reconstructed using calibration data simulated Monte-Carlo simulations. Despite scintillator stack showed some problems like thickness inhomogeneities unequal layer...
DarkSide-20k (DS-20k) is a dark matter detection experiment under construction at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. It utilises ~100 t of low radioactivity argon from an underground source (UAr) its inner detector, with half serving as target dual-phase time projection chamber (TPC). The UAr cryogenics system must maintain stable thermodynamic conditions throughout experiment's lifetime >10 years. Continuous removal impurities and radon essential for maximising signal...
The growing interest toward the development of high‐Z–sensitized organic scintillators is related with potential possibility to merge advantages materials those inorganics. In fact, plastic offer large‐area applications and fast response at a low cost, yet their performances for high‐energy photons charged particles are limited by poor stopping power low‐Z materials. real‐time optical investigation in terms steady‐state luminescence spectra polysiloxane/quantum dot (QD) nanocomposite samples...
The need to push the timing performances limit finds breeding ground in several fields from high energy physics biomedical applications such as Time of Flight Positron Emission Tomography (ToF-PET). In last years, excellent results have been achieved thanks improvement scintillator crystal materials, electronics readout and detector development. this context, SiPM Coincidence Resolution (CTR) is a key parameter order assess device performance. work we will present CTR recently introduced FBK...
In this paper, we present a two-layered silicon sensor working in Geiger-mode avalanche regime and designed for charged particle detection. Each position-sensitive element is comprised of two vertically aligned pixels, exploiting the coincidence between simultaneous events to discriminate triggers dark counts. This approach potentially offers several advantages. First, low material budget can be achieved thanks thinning detector down few tens microns (e.g. 50 μm) as starts shallow region...