A5055007311- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Laser-Plasma Interactions and Diagnostics
- Mass Spectrometry Techniques and Applications
- Spectroscopy and Quantum Chemical Studies
- Laser-induced spectroscopy and plasma
- Laser Design and Applications
- Laser Material Processing Techniques
- Geophysics and Sensor Technology
- Advanced Chemical Physics Studies
- Atomic and Molecular Physics
- Spectroscopy Techniques in Biomedical and Chemical Research
- Analytical Chemistry and Sensors
- Photochemistry and Electron Transfer Studies
- MXene and MAX Phase Materials
- DNA and Nucleic Acid Chemistry
- Cosmology and Gravitation Theories
- Light effects on plants
- Mechanical and Optical Resonators
- Ion-surface interactions and analysis
- Ocular and Laser Science Research
- 2D Materials and Applications
- Astronomy and Astrophysical Research
- Molecular Junctions and Nanostructures
- Advanced Frequency and Time Standards
University of Naples Federico II
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2015-2024
Institute of Applied Science and Intelligent Systems
2023-2024
Istituto Nazionale di Fisica Nucleare
2020-2024
University of Campania "Luigi Vanvitelli"
2021
Naples Anesthesia & Physician Associates
2017-2019
National Interuniversity Consortium for the Physical Sciences of Matter
2006-2017
Federico II University Hospital
2009-2014
Brera Astronomical Observatory
2009
University of Ottawa
2008
We generated single-cycle isolated attosecond pulses around approximately 36 electron volts using phase-stabilized 5-femtosecond driving with a modulated polarization state. Using complete temporal characterization technique, we demonstrated the compression of for as low 130 attoseconds, corresponding to less than 1.2 optical cycles. Numerical simulations generation process show that carrier-envelope phase is stable. The availability opens way new regime in ultrafast physics, which...
We experimentally investigate the process of intramolecular quantum interference in high-order harmonic generation impulsively aligned CO2 molecules. The recombination effect is clearly seen through order dependence yield an sample. experimental results can be well modeled assuming that effective de Broglie wavelength returning electron wave not significantly altered by Coulomb field molecular ion. demonstrate such effects effectively controlled changing ellipticity driving laser field.
The following topics are dealt with: TTF/FLASH in the XFEL context, general layout of facility, accelerator, undulators for SAES and spontaneous emission, photon beamlines scientific instruments, infrastructure auxiliary systems, commissioning operation, project management organization, cost time schedule. (HSI)
A numerical model to calculate the high-order harmonics spectrum of a macroscopic gas target irradiated by few-optical-cycle laser pulse is presented. The single-atom response, calculated within nonadiabatic strong-field approximation, source term three-dimensional propagation code. simulation results show remarkably good agreement with experiments performed in neon using pulses durations 30 and 7 fs. Both simulations discrete well-resolved even for shortest driving pulses.
The effects of electronic structure and symmetry are observed in laser driven high-order harmonic generation for aligned conjugated polyatomic molecular systems. dependence the yield on angle between axis polarization driving field is seen to contain fingerprint highest occupied orbitals acetylene allene, a good quantitative agreement with calculations employing strong approximation was found. These measurements support extension recently proposed orbital imaging techniques beyond simple...
Two dimensional materials beyond graphene such as MoS2 and WS2 are novel interesting class of whose unique physico-chemical properties can be exploited in applications ranging from leading edge nanoelectronics to the frontiers between biomedicine biotechnology. To unravel potential TMD crystals biomedicine, control over their production through green scalable routes biocompatible solvents is critically important. Furthermore, considering multiple eco-friendly 2D dispersions impact onto live...
High-order harmonic generation (HHG) from molecules produces spectra that are modulated by interferences encode both the static structure and electron dynamics initiated interaction with laser field. Using a midinfrared (mid-IR) at $1300$ nm, we able to study region of spectrum containing such in ${\mathrm{CO}}_{2}$ over wide range intensities. This allows for isolation characterization interference minima arising due subcycle electronic triggered field, which had previously been identified...
Ring Laser Gyroscopes, based on the Sagnac effect, are currently most sensitive rotation sensors. GINGERINO, a RLG installed underground, shows proved sensitivity that enters few frad/s regime in about 2.5 days of integration time. On one hand, this is well below shot–noise–level as predicted applying to GINGERINO so called independent beam model. other it paves way use fundamental and quantum physics research. Indeed, high measurement opens test general relativity alternative theory...
We demonstrate that two harmonic sources generated independently in a xenon gas jet using the same picosecond Nd:YAG laser are locked phase. The experiment is performed by separating beam into parallel beams focused at different locations under nozzle of jet, and therefore producing independent radiation, studying pattern obtained far field when radiations from these interfere. A high robust fringe visibility obtained.
Photonic immobilization technique (PIT) has been used to develop an immunosensor for the detection of parathion. An antibody solution activated by breaking disulfide bridge in triad Trp/Cys-Cys through absorption ultrashort UV laser pulses. The free thiol groups so produced interact with gold lamina making oriented upside, that is, its variable parts exposed environment, thereby greatly increasing efficiency. PIT applied anchor polyclonal antiparathion antibodies electrode a Quartz Crystal...
Interactions of novel bi-dimensional nanomaterials and live matter such as bacteria viruses represent an extremely hot topic due to the unique properties innovative nanomaterials, capable in some cases exhibit bactericide antiviral actions. The interactions between two dimensional nanosheets are here investigated. We extensively studied interaction a gram-negative bacterium, Escherichia coli, gram-positive Staphylococcus aureus, with different types 2D nanoflakes MoS2, belonging Transition...
The pursuit of environmentally friendly solvents has become an essential research topic in sustainable chemistry and nanomaterial science. With the need to substitute toxic nanofabrication processes becoming more pressing, search for alternative taken on a crucial role this field. Additionally, use toxic, non-economical organic solvents, such as N-methyl-2 pyrrolidone dimethylformamide, is not suitable all biomedical applications, even though these are often considered best exfoliating...
Antimonene (Sb) is an emerging two-dimensional material belonging to group VA that has shown excellent chemical and physical properties with applications in optoelectronics, energy, catalysis, biomedical sciences. However, the...
We have investigated how high-order harmonics generated in rare gases depend on the atomic density. The peak and profile of density interaction region were measured as a function backing pressure distance from nozzle by differential interferometry technique. conversion efficiency for plateau was found to increase approximately quadratically over entire range pressures (3–80 mbar). intensity cutoff region, contrast, increased only until an optimum reached, beyond which it decreased. This be...
The emerging techniques of molecular spectroscopy by high order harmonic generation have hitherto been conducted only with Ti:Sapphire lasers which are restricted to molecules ionization potentials. In gain information on the structure, a broad enough range harmonics is required. This implies using laser intensities would saturate most systems interest, e.g. organic molecules. Using at 1300 nm, we able extend technique relatively low potentials (approximately 11 eV), observing wide spectra...
Ultrashort UV pulses at 258 nm with repetition rate of 10 kHz have been used to irradiate buffer solution antibody. The tryptophan residues strongly absorb this radiation thus becoming capable disrupt the disulfide bridges located next them. Due their high reactivity opened can anchor a gold plate more efficiently than other sites macromolecule giving rise preferential orientations variable part irradiation has applied antiIgG antibody electrode Quartz Crystal Microbalance (QCM) that lends...
Background Biosensor-based detection provides a rapid and low-cost alternative to conventional analytical methods for revealing the presence of contaminants in water as well solid matrices. Although important be detected, small analytes (few hundreds Daltons) are an issue biosensing since signal they induce transducer, specifically Quartz-Crystal Microbalance, is undetectable. A pesticide like parathion (M = 292 Da) typical example contaminant which amplification procedure desirable....
Abstract The debate on gravity theories to extend or modify general relativity is very active today because of the issues related ultraviolet and infrared behavior Einstein’s theory. In first case, we have address quantum problem. latter, dark matter energy, governing large-scale structure cosmological evolution, seem escape from any final fundamental theory detection. state art that, up now, no theory, capable explaining gravitational interaction at scale, has been formulated. this...
Low-divergence, high-brightness harmonic emission has been generated by using a fundamental beam with truncated Bessel intensity profile. Such is directly obtained the hollow-fiber compression technique, which indeed allows one to optimize both temporal and spatial characteristics of high-order generation process. This particularly important for applications radiation, where extreme resolution high brightness are required.
We have demonstrated the ability of few-cycle midinfrared intense laser pulses to produce extended harmonic spectra (≥45 eV) suitable for high spectroscopy in aligned hydrocarbons with ionization potentials range 9.07–11.52 eV. Modulations measured different alignment angles show signatures molecular structure. These results pave way extension complex biomolecules.
We present the final data from spectroscopic survey of ROSAT-ESO Flux-Limited X-ray (REFLEX) catalog galaxy clusters. The REFLEX covers 4.24 steradians (34% entire sky) below a declination <i>δ<i/> = +2.5<sup>0<sup/> and at high Galactic latitude (|<i>b<i/>| > 20°). includes 447 entries with median redshift 0.08 is better than 90% complete to limiting flux <i>f<i/><sub>X<sub/> 310<sup>-12<sup/> erg s<sup>-1<sup/> cm<sup>-2<sup/> (0.1 2.4 keV), representing largest statistically homogeneous...
RATIONALE The aim of this study was to demonstrate, and characterize by high‐resolution mass spectrometry that it is possible preferentially induce covalent cross‐links in peptides using high‐energy femtosecond ultraviolet (UV) laser pulses. cross‐link readily formed only when aromatic amino acids are present the peptide sequence. METHODS Three peptides, xenopsin, angiotensin I, interleukin, individually or combination, were exposed UV pulses, either alone presence spin trapping molecules,...