A5019092097- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Gold and Silver Nanoparticles Synthesis and Applications
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Atmospheric Ozone and Climate
- Plasmonic and Surface Plasmon Research
- Spectroscopy and Laser Applications
- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Advanced Frequency and Time Standards
- Solar and Space Plasma Dynamics
- Radio Astronomy Observations and Technology
- Electrochemical Analysis and Applications
- Nuclear Physics and Applications
- Medical Imaging Techniques and Applications
- Spectroscopy and Quantum Chemical Studies
- Near-Field Optical Microscopy
- Ionosphere and magnetosphere dynamics
- Superconducting Materials and Applications
University of Bologna
2015-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2014-2025
Osservatorio astronomico di Bologna
2019-2025
Universitat de València
2021-2024
Instituto de Física Corpuscular
2021-2024
National Institute for Subatomic Physics
2021-2023
Friedrich-Alexander-Universität Erlangen-Nürnberg
2020-2022
Istituto Nazionale di Fisica Nucleare
2000-2021
Centre National de la Recherche Scientifique
2003-2021
Université Paris Cité
2000-2021
In this letter, we show that tuning the maximum of surface plasmon resonance elongated gold nanoparticles to a wavelength, position which is precisely midway between exciting laser line and Raman line, results in an optimization surface-enhanced Raman-scattering effect.
This paper is intended to show how the control of optical response regular arrays gold nanoparticles allows improve our understanding surface-enhanced Raman scattering (SERS). Regular particle arrays, designed by electron-beam lithography, exhibit remarkable properties and appear be suitable substrates for deepened study mechanisms at origin SERS effect. Indeed, resonance surface plasmons localized on particles, which are visible near-infrared extinction spectra effect, can tuned almost any...
This search for magnetic monopoles (MMs) and high electric charge objects (HECOs) with spins 0, 1/2, 1, uses the first time full MoEDAL detector, exposed to 6.46 fb^{-1} proton-proton collisions at 13 TeV. The results are interpreted in terms of Drell-Yan photon-fusion pair production. Mass limits on direct production MMs up 10 Dirac charges HECOs range 10e 400e, were achieved. placed MM HECO currently strongest world. is only LHC experiment capable being directly calibrated highly ionizing...
We study the importance of an often-overlooked aspect surface-enhanced fluorescence (SEF): spectral profile modification (SPM) that should accompany any plasmon-resonance-mediated enhancement or quenching close to metal surfaces. argue theoretically and demonstrate experimentally under SEF conditions plasmon resonances affect not only intensity (enhancement quenching) but also its profile, sometimes a point where original spectrum may no longer be recognizable as such. Moreover, we modified...
The influence of substrate induced coupling on plasmon excitations is probed by means visible and near-infrared extinction microspectroscopy various arrays gold oblate spheroidal particles deposited onto a 20-nm-thick film. At zero incidence angle for an interparticle spacing smaller than 250 nm, the spectra exhibit two bands instead single one observed similar but indium tin oxide coated glass. We suggest that short-wavelength band proceeds from simultaneous mechanisms: (i) Excitation...
A small electromagnetic sampling calorimeter, installed in the ZEUS experiment 1995, significantly enhanced acceptance for very low x and Q^2 inelastic neutral current scattering, e^{+}p \to e^{+}X, at HERA. measurement of proton structure function F_2 total virtual photon-proton (\gamma^*p) cross-section is presented 0.11 \le Q^{2} 0.65 GeV^2 2 \times 10^{-6} 6 10^{-5}, corresponding to a range \gamma^{*}p c.m. energy 100 W 230 GeV. Comparisons with various models are also presented.
Lithographically designed two-dimensional arrays consisting of gold nanoparticles deposited on a smooth film are used as substrate to examine the SERS effect trans-1,2-bis (4-pyridyl) ethylene molecule. These display two plasmon bands instead single one observed for same particles but indium tin oxide coated glass. Laser excitation within short wavelength band does not bring about any spectrum, while long yields spectra with gain per molecule rising up 10(8). The simultaneous investigation...
Visible and near-infrared extinction spectra of regular arrays gold nanorods display several bands depending on polarization the electromagnetic incident field. When setting field perpendicular to nanorod axis (transverse polarization), a single band is observed, which assigned dipolar plasmon mode. The obtained under an along (longitudinal polarization) are attributed multipolar resonances. Raman scattering experiments carried out transverse longitudinal laser excitations methylene blue...
The failure of the so-called |E|4 approximation surface-enhanced Raman scattering (SERS) electromagnetic (EM) enhancement factor is demonstrated experimentally using arrays highly uniform gold nanoparticles specially designed for this purpose. This first unpolarized detection, and interpretation results then becomes evident by studying case polarized detection. These provide, at same time, a clear experimental verification generalized EM theory SERS beyond (Chem. Phys. Lett. 2006, 423, 63)....
We study the dipolar coupling of gold nanoparticles arranged in regular two-dimensional arrays by extinction micro-spectroscopy. When interparticle spacing approaches plasmon resonance wavelength individual particles, an additional band very narrow width emerges spectrum. By systematically changing particles dielectric environment, shape, grating constant and angle incidence, we show how this associated to a induced-resonance can be influenced strength spectral position. The position...
MoEDAL is designed to identify new physics in the form of stable or pseudostable highly ionizing particles produced high-energy Large Hadron Collider (LHC) collisions. Here we update our previous search for magnetic monopoles Run 2 using full trapping detector with almost four times more material and twice integrated luminosity. For first time at LHC, data were interpreted terms photon-fusion monopole direct production addition Drell-Yan-like mechanism. The detector, consisting 794 kg...
We present the results of first combined dark matter search targeting Galactic Centre using ANTARES and IceCube neutrino telescopes. For particles with masses from 50 to 1000 GeV, sensitivities on self-annihilation cross section set by are comparable, making this mass range particularly interesting for a joint analysis. Dark through $\tau^+\tau^-$, $\mu^+\mu^-$, $b\bar{b}$ $W^+W^-$ channels is considered both Navarro-Frenk-White Burkert halo profiles. In combination 2,101.6 days data 1,007...
Abstract Active galaxies, especially blazars, are among the most promising extragalactic candidates for high-energy neutrino sources. To date, ANTARES searches included these objects and used GeV–TeV γ -ray flux to select blazars. Here, a statistically complete blazar sample selected by their bright radio emission is as target of origins neutrinos collected telescope over 13 yr operation. The hypothesis neutrino–blazar directional correlation tested pair counting complementary...