A5068361758- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Laser-Plasma Interactions and Diagnostics
- Spectroscopy and Quantum Chemical Studies
- Mass Spectrometry Techniques and Applications
- Advanced Chemical Physics Studies
- Atomic and Molecular Physics
- Spectroscopy Techniques in Biomedical and Chemical Research
- Laser Design and Applications
- Advanced X-ray Imaging Techniques
- Solid State Laser Technologies
- Photonic Crystal and Fiber Optics
- Laser Material Processing Techniques
- Library Science and Administration
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- Spectroscopy and Chemometric Analyses
- Fullerene Chemistry and Applications
- Quantum, superfluid, helium dynamics
- Synthesis and Properties of Aromatic Compounds
- Advanced optical system design
- Quantum optics and atomic interactions
- Spectroscopy and Laser Applications
- Optical Coherence Tomography Applications
- Non-Invasive Vital Sign Monitoring
Louisiana State University
2024
Istituto Ramazzini
2024
Istituto di Fotonica e Nanotecnologie
2011-2023
Politecnico di Milano
2010-2022
National Research Council
2011-2022
Center for Biomolecular Nanotechnologies
2014-2022
Bioengineering Technology and Systems (Italy)
2019
Mylan (Switzerland)
2016-2017
University of Pisa
2016
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2016
A temporal gating on the high-order harmonic emission process is achieved using an intense 20 fs, 1.45 μm pulse (IR) in combination with 13 800 nm [visible (VIS)]. Exploiting this two-color scheme, a coherent continuous extending up to 160 eV Ar gas and 200 Ne efficiently generated. The IR contributes significantly higher photon energies, whereas VIS improves conversion efficiency of process. These results indicate possibility produce bright attosecond pulses approaching soft X spectral region.
We investigated the giant resonance in xenon by high-order harmonic generation spectroscopy driven a two-color field. The addition of nonperturbative second component parallel to driving field breaks symmetry between neighboring subcycles resulting appearance spectral caustics at two distinct cutoff energies. By controlling phase delay color components it is possible tailor emission order amplify and isolate feature interest. In this Letter we demonstrate how control scheme can be used...
High harmonic generation (HHG) spectroscopy has opened up a new frontier in ultrafast science, where electronic dynamics can be measured on an attosecond time scale. The strong laser field that triggers the high response also opens multiple quantum pathways for multielectron molecules, resulting complex process of rearrangement during ionization. Using combined experimental and theoretical approaches, we show how multi-dimensional HHG used to detect follow core sub-laser cycle scales. We...
Over the last few decades, investigation of ultrafast phenomena occurring in atoms, molecules and solid-state systems under a strong-field regime light-matter interaction has attracted great attention. The increasing request for suitable optical technology is significantly boosting development powerful laser sources. In this framework, Optical Parametric Amplification (OPA) currently becoming leading solution applications high-power ultra-broadband light burst generation. main advantage...
Chiral molecules are widespread in nature, playing a fundamental role bio-chemical processes and the origin of life itself. The observation dynamics chiral is crucial for understanding control activity photo-excited states. One most promising techniques study systems time-resolved photoelectron circular dichroism (TR-PECD), which offers an intense sensitive probe vibronic geometric molecular structure as well electronic structures, their evolution on femtosecond timescale. However, non-local...
We report on the detection of X-ray polarisation in black-hole binary Swift J1727.8$-$1613 during its dim hard spectral state by Imaging Polarimetry Explorer (IXPE). This is first at transition from soft to an binary. find averaged 2$-$8 keV degree (3.3 ${\pm}$ 0.4) % and a corresponding angle 3{\deg} 4{\deg}, which matches detected rising stage outburst, September$-$October 2023, within 1${\sigma}$ uncertainty. The observational campaign complements previous studies this source enables...
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.
Owing to the increasing significance of high harmonic generation (HHG) as a tabletop coherent x-ray source and coming age intense infrared (IR) lasers, development brightness soft beamlines is gaining lot attention. We discuss self-guided propagation energy IR pulses around 1.8 μm centre wavelength being loosely focused into long, high-pressure gas cell. A bright beam with photon energies extending up oxygen K-edge at 543 eV achieved flux 2.9 × 103 photons/shot/1% bandwidth carbon (280 eV)....
The hitherto unexplored two-photon doubly excited states [Ne^{*}(2p^{-1}3s)]_{2} were experimentally identified using the seeded, fully coherent, intense extreme ultraviolet free-electron laser FERMI. These undergo ultrafast interatomic Coulombic decay (ICD), which predominantly produces singly ionized dimers. In order to obtain rate of ICD, resulting yield Ne_{2}^{+} ions was recorded as a function delay between pump and UV probe pulses. extracted lifetimes long-lived states, 390(-130/+450)...
We implemented a new experimental scheme for the generation of single-shot extreme-UV continua that exploits combination transform-limited 15 fs, 800 nm pulses and chirped 35 with orthogonal polarizations. Continua are interpreted as formation single attosecond pulse attributed to interplay between polarization, ionization gating, trajectory selection operated by suitable phase-matching conditions.
We experimentally demonstrate a new technique for the temporal gating of high-order harmonic generation, based on mixing two mid-infrared laser pulses coming from optical parametric amplifiers, at wavelengths 1.35 and 1.75 μm, respectively. Both parallel perpendicular configurations polarization directions were investigated. Results obtained in xenon argon show continuous spectra with significant cutoff extension, up to 160 eV. These outcomes possibility extending two-color generation...
We report on our experimental and theoretical investigations the generation of high-order harmonics driven by 1500 nm few-cycle laser pulses in xenon. In contrast to common belief, we found evidence suggesting that harmonic mid-infrared can be realized with high efficiency; particular, an enhancement very orders achieved under suitable conditions laser–medium interaction. The results were simulated a 3D non-adiabatic model. outcomes confirm findings provide physical explanation for...
The development of compact and bright XUV soft X-ray sources based on high-order harmonic generation is boosting advances towards understanding the behavior matter with extreme temporal spatial resolutions. Here, we report efficient inside microfluidic devices fabricated by femtosecond laser irradiation followed chemical etching. Our approach allows one to control manipulate conditions in gas a micro-meter scale unprecedented flexibility, thus enabling high photon-flux broadband harmonics...
<p> A free guide for formerly incarcerated people in New York City, 2022 edition. </p>
<p> A free guide for formerly incarcerated people in New York City, 2022 edition. </p>
<p>A free guide for formerly incarcerated people in New York City, 2023 edition. </p>
High-order harmonic generation is a powerful and sensitive tool for probing atomic molecular structures, combining in the same measurement an unprecedented attosecond temporal resolution with high spatial resolution, of order angstrom. Imaging outermost orbital by high-order has been limited long time to very simple molecules, like nitrogen. Recently we demonstrated technique that overcame several issues have prevented extension tomography more complex species, showing imaging can be applied...
Ne clusters (∼5000 atoms) were resonantly excited (2p→3s) by intense free electron laser (FEL) radiation at FERMI. Such multiply can decay nonradiatively via energy exchange between least two neighboring atoms. Benefiting from the precise tunability and narrow bandwidth of seeded FEL radiation, specific sites probed. We found that relaxation cluster surface atoms proceeds a sequence interatomic or intermolecular Coulombic (ICD) processes while ICD bulk is additionally affected surrounding...
The development of ultrafast and intense laser sources has paved the way to study laser–matter interaction in strong-field regime, where amplitude field becomes comparable Coulomb seen by electrons proximity their parent ion. This realm embraces numerous phenomena, such as high-order harmonic generation, tunnel photoionization, laser-induced electron diffraction holography, ponderomotive streaking, so forth. For a long time, Ti:Sapphire been sole workhorse scientists; recent tunable...