A5002547150- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Geophysics and Gravity Measurements
- Molecular Junctions and Nanostructures
- Astrophysical Phenomena and Observations
- Magnetic properties of thin films
- Advanced Chemical Physics Studies
- High-pressure geophysics and materials
- Cosmology and Gravitation Theories
- Gold and Silver Nanoparticles Synthesis and Applications
- Surface and Thin Film Phenomena
- nanoparticles nucleation surface interactions
- Geophysics and Sensor Technology
- Plasmonic and Surface Plasmon Research
- Quantum Dots Synthesis And Properties
- Astrophysics and Cosmic Phenomena
- ZnO doping and properties
- Electron and X-Ray Spectroscopy Techniques
- Dark Matter and Cosmic Phenomena
- 2D Materials and Applications
- Theoretical and Computational Physics
- Atomic and Subatomic Physics Research
University of Genoa
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2015-2024
Rice University
2022
Chemnitz University of Technology
2022
Superconducting and other Innovative Materials and Devices Institute
2022
Istituto Nanoscienze
2019
AREA Science Park
2006-2019
Istituto Officina dei Materiali
2019
National Institute for Subatomic Physics
2019
National Interuniversity Consortium for the Physical Sciences of Matter
2007-2015
Current interferometric gravitational-wave detectors are limited by quantum noise over a wide range of their measurement bandwidth. One method to overcome the limit is injection squeezed vacuum states light into interferometer's dark port. Here, we report on successful application this technology improve shot sensitivity Advanced Virgo detector. A enhancement up 3.2±0.1 dB beyond achieved. This nonclassical improvement corresponds 5%–8% increase binary neutron star horizon. The squeezing was...
Abstract We perform a statistical standard siren analysis of GW170817. Our does not utilize knowledge NGC 4993 as the unique host galaxy optical counterpart to Instead, we consider each within GW170817 localization region potential host; combining redshifts from all galaxies with distance estimate provides an Hubble constant, H 0 . Considering brighter than equally likely binary neutron star merger, find km s −1 Mpc (maximum posteriori and 68.3% highest density posterior interval; assuming...
Small aluminum nanoparticles have the potential to exhibit localized surface plasmon resonances in deep ultraviolet region of electromagnetic spectrum, however technical and scientific challenges make it difficult attain this limit. We report fabrication arrays Al/Al2O3 core/shell with a metallic-core diameter between 12 25 nm that display sharp plasmonic at very high energies, up 5.8 eV (down λ = 215 nm). The were fabricated by means straightforward self-organization approach. experimental...
In this work we present a simple pathway to obtain large single-crystal graphene on copper (Cu) foils with high growth rates using commercially available cold-wall chemical vapour deposition (CVD) reactor.We show that nucleation density is drastically reduced and crystal accelerated when: i) ex-situ oxidised foils; ii) performing annealing in an inert atmosphere prior growth; iii) enclosing the lower precursor impingement flux during growth.Growth as 14.7 17.5 µm per minute are obtained flat...
We report on a high-resolution X-ray photoemission spectroscopy study molecular-thick layers of l-cysteine deposited under ultrahigh vacuum conditions Au(110). The analysis core level shifts allowed us to distinguish unambiguously the states first-layer molecules from those belonging second layer. strongly interact with metal through their sulfur headgroup. multipeaked structure N 1s, O and C 1s levels is interpreted in terms different molecular moieties. neutral acidic fraction...
Abstract The three advanced Virgo and LIGO gravitational wave detectors participated to the third observing run (O3) between 1 April 2019 15:00 UTC 27 March 2020 17:00 UTC, leading several detections per month. This paper describes detector calibration reconstruction of strain h ( t ) during O3, as well estimation associated uncertainties. For first time, photon technique been used reference for calibration, which allowed cross-calibrate amplitude detectors. previous reference, so-called...
In this Letter, we present the design and performance of frequency-dependent squeezed vacuum source that will be used for broadband quantum noise reduction Advanced Virgo Plus gravitational-wave detector in upcoming observation run. The field is generated by a phase rotation frequency-independent state through 285 m long, high-finesse, near-detuned optical resonator. With about 8.5 dB squeezing, up to 5.6 suppression has been measured at high frequency while close filter cavity resonance...
The increasing demand for heterogeneous materials prompts the interest physics and chemistry of organic–inorganic interfaces. Within this field we have investigated electronic states L-cysteine (Cys) adsorbed on Au(111) from aqueous solution with synchrotron-based, high resolution X-ray photoemission spectroscopy. analysis S 2p core level region in pristine samples prepared purified Cys indicates that adsorbs gold as a thiolate. absence signal related to physisorbed sulfur forms...
A study of the self-assembly 1,4-benzenedimethanethiol (BDMT; HS-CH(2)-(C(6)H(4))-CH(2)-SH) monolayers on gold is presented. Self-assembled (SAMs) are characterized by reflection-absorption infrared spectroscopy (RAIRS), X-ray photoelectron (XPS), and spectroscopic ellipsometry (SE) measurements. The ensemble measurements consistently shows that well-organized BDMT SAMs, with "standing-up" molecules, can be obtained high quality films incubation in n-hexane provided N(2)-degassed solutions...
We have investigated the optical response of thiolate self-assembled monolayers (SAMs) deposited from liquid phase on well characterized, (111)-textured gold films based use in situ and ex spectroscopic ellipsometry. considered SAMs formed by several molecules with thiol functionality, focusing octadecanethiol (C18) SAM model system. were able to show tiny variations induced monolayer thick great reproducibility high signal-to-noise ratio. identified spectral features related alkyl chain...
We report a study of the self-assembly 1,4-benzenedimethanethiol monolayers on gold formed in n-hexane solution held at 60 °C for 30 min and dark conditions. The valence band characteristics, thickness layer, orientation molecules were analyzed synchrotron using high resolution photoelectron spectroscopy near edge X-ray adsorption spectroscopy. These measurements unambiguously attest formation single layer with arranged upright position presenting free -SH group outer interface. Near...
The localized surface plasmon resonance of metal nanoparticles allows confining the eletromagnetic field in nanosized volumes, creating high-field "hot spots", most useful for enhanced nonlinear optical spectroscopies. commonly employed metals, Au and Ag, yield resonances only spanning visible/near-infrared range. Stretching upward, energy range plasmonics requires exploiting different materials. Deep-ultraviolet happen to be achievable with one cheapest abundant materials available:...
This work reports an electronic and micro-structural study of appealing system for optoelectronics: tungsten disulphide (WS<sub>2</sub>) on epitaxial graphene (EG) SiC(0001).
In August 2017, Advanced Virgo joined LIGO for the end of O2 run, leading to first gravitational waves detections with three-detector network. This paper describes calibration and wave strain h(t) reconstruction during O2. The methods are same as ones developed initial detector have already been described in previous publications, this summarizes differences emphasis is put on estimating systematic uncertainties. Three versions signal computed an online version two post-run reprocessed...
The quantum radiation pressure and the shot noise in laser-interferometric gravitational wave detectors constitute a macroscopic manifestation of Heisenberg inequality. If can be easily observed, observation has been elusive, so far, due to technical competing with effects. Here, we discuss evidence Advanced Virgo detector. In our experiment, inject squeezed vacuum states light into interferometer order manipulate backaction on 42 kg mirrors observe corresponding driven displacement at...
We report the room-temperature, low-voltage-enabled modulation of optical response hybrid transparent-conductive-oxide/ferroelectric multilayers in infrared spectral range. have fabricated an multilayer consisting Al-doped ZnO (AZO)...
We have investigated the possibility of isolating step-induced in-plane uniaxial magnetic anisotropy in Fe/Ag(001) films on which nanoscale surface ripples were fabricated by ion sculpting technique. For rippled Fe deposited flat Ag(001), steps created along ripple sidewalls are shown to be only source anisotropy. Ion ultrathin allows one selectively study and investigate correlation between local atomic environment properties.
A study of the self-assembly nonane-alkanedithiol monolayers on gold in n-hexane and ethanol solvents is presented. Self-assembled (SAMs) are characterised by reflection-absorption infrared spectroscopy (RAIRS), sum frequency generation (SFG) spectroscopic ellipsometry (SE) measurements. Data obtained for alkanethiols SAMs also shown comparison. The measurements show that nicely organized HSC9SH can be provided N2-degassed solutions used all preparation steps performed absence ambient light....
Ellipsometry of hot gold nanoparticles reveals deviations their optical properties from expectations due to temperature-induced surface effects.
Aminophosphonates were chosen for a first step functionalization of TiO2 grown on titanium, as they possess phosphonate group one end, that can be exploited coupling with the oxide surface, and an amino other end to enable further surface. The deposition aminophosphonates different chain lengths (6 12 methylenes) was investigated. Oxygen plasma treatment proved useful in increasing number −OH groups at thus helping anchor aminophosphonates. By combining surface-sensitive experimental...