A5063496712- Laser-Plasma Interactions and Diagnostics
- Graphene research and applications
- Molecular Junctions and Nanostructures
- Laser-induced spectroscopy and plasma
- Surface and Thin Film Phenomena
- Laser Design and Applications
- Laser-Matter Interactions and Applications
- Fullerene Chemistry and Applications
- Advanced Chemical Physics Studies
- Solid State Laser Technologies
- Electron and X-Ray Spectroscopy Techniques
- nanoparticles nucleation surface interactions
- Luminescence Properties of Advanced Materials
- High-pressure geophysics and materials
- 2D Materials and Applications
- Trauma and Emergency Care Studies
- Artificial Intelligence in Healthcare and Education
- Plasma Diagnostics and Applications
- Chalcogenide Semiconductor Thin Films
- Advanced Physical and Chemical Molecular Interactions
- MXene and MAX Phase Materials
- Quantum Dots Synthesis And Properties
- Carbon Nanotubes in Composites
- Quantum and electron transport phenomena
- Optical Systems and Laser Technology
Extreme Light Infrastructure - Nuclear Physics
2019-2025
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2019-2025
University of Baltimore
2020
Johns Hopkins University
2020
University of New Hampshire
2007-2016
Sandia National Laboratories
2014
Los Alamos National Laboratory
2013
Sandia National Laboratories California
2013
Institutul de Fizică Atomică
2001-2002
The European Strategy Forum on Research Infrastructures (ESFRI) has selected in 2006 a proposal based ultra-intense laser fields with intensities reaching up to 1022-1023 W cm-2 called 'ELI' for Extreme Light Infrastructure. construction of large-scale laser-centred, distributed pan-European research infrastructure, involving beyond the state-of-the-art ultra-short and technologies, received approval funding 2011-2012. three pillars ELI facility are being built Czech Republic, Hungary...
The emergence of a new era reaching beyond current state-of-the-art ultrashort and ultraintense laser technology has been enabled by the approval around € 850 million worth structural funds in 2011–2012 European Commission for installation Extreme Light Infrastructure (ELI). ELI project consists three pillars being built Czech Republic, Hungary, Romania. This challenging proposal is based on recent technical progress allowing fields which intensities will soon be as high I0 ∼ 1023 W cm−2....
Abstract We report on the generation and delivery of 10.2 PW peak power laser pulses, using High Power Laser System at Extreme Infrastructure – Nuclear Physics facility. In this work we demonstrate for first time, to best our knowledge, compression propagation full energy, aperture, pulses that reach a level more than 10 PW.
Heterogeneous engineering of two-dimensional layered materials, including metallic graphene and semiconducting transition metal dichalcogenides, presents an exciting opportunity to produce highly tunable electronic optoelectronic systems. In order engineer pristine layers their interfaces, epitaxial growth such heterostructures is required. We report the direct crystalline, monolayer tungsten diselenide (WSe2) on (EG) grown from silicon carbide. Raman spectroscopy, photoluminescence,...
Low-energy reflectivity of electrons from single- and multilayer graphene is examined both theoretically experimentally. A series minima in the over energy range 0--8 eV are found, with number depending on layers. Using first-principles computations, it demonstrated that a freestanding $n$-layer slab produces $n\ensuremath{-}1$ minima. This same result also found experimentally for supported SiO${}_{2}$. For bonded onto other substrates argued similar expected, although certain cases an...
We study the structure of electronic states in individual PbS nanocrystal quantum dots by scanning tunneling spectroscopy (STS) using one-to-two monolayer films treated with 1, 2-ethanedithiols (EDT). Up to six valence and conduction band are resolved for a range dot sizes. The measured states' energies good agreement calculations k · p four-band envelope function formalism. A comparison STS optical absorption spectra indicates that some features can only be explained asymmetric transitions...
Emergency surgery represents a unique context. Trauma teams are often multidisciplinary and need to operate under extreme stress time constraints, sometimes with no awareness of the trauma's causes or patient's personal clinical information. In this perspective, dynamics how trauma function is fundamental ensuring best performance outcomes.An online survey was conducted among World Society Surgery members in early 2021. 402 fully filled questionnaires on topics knowledge translation tools,...
Contrary to previous reports we show that the acoustic surface plasmon (ASP) exists also at noble-metal surfaces, thus demonstrating generality of this phenomenon in presence partially filled Shockley states. Angle-resolved high-resolution electron energy loss spectroscopy measurements and calculations function indicate for Cu(111) ASP is a sharp feature up about 0.4 eV. The dispersion indeed linear (acoustic) with slope (sound velocity) (4.33±0.33) eVÅ good agreement recent theoretical...
Conventional means of stacking two-dimensional (2D) crystals inevitably leads to imperfections. To examine the ramifications these imperfections, rotational disorder and strain are quantified in twisted bilayer graphene (TBG) using a combination Raman spectroscopic low-energy electron diffraction imaging. The twist angle between TBG layers varies on order 2° within large (50-100 μm) single-crystalline grains, resulting changes emergent response by over an magnitude. Rotational does not...
High-power laser systems have opened new frontiers in scientific research and revolutionized various fields, offering unprecedented capabilities for understanding fundamental physics allowing unique applications. This paper details the successful commissioning of 1 PW experimental area at Extreme Light Infrastructure–Nuclear Physics (ELI-NP) facility Romania, using both available arms. The setup featured a short focal parabolic mirror to accelerate protons through target normal sheath...
We present a combined experimental and theoretical study of molecular methanethiol $({\text{CH}}_{3}\text{SH})$ adsorption on the reconstructed Au(111) surface in temperature range between 90 300 K UHV. find that simplest thiol molecules form two stable self-assembled monolayer (SAM) structures are created by distinct processes. Below 120 K, solid rectangular phase, preserving herringbone reconstruction, emerges from individual chains spontaneously formed dimers. At higher temperatures below...
We present a combined experimental and theoretical study of the self-assembly C60 molecules functionalized with long alkane chains on (111) surface silver. find that conformation changes upon adsorption Ag(111) unit cell size in self-assembled monolayer is determined by interactions between functional groups. show can be assembled ordered 2D arrays intermolecular distances much larger than those compact layers, propose novel way to control pattern appropriate chemical functionalization.
The high-resolution spectroscopic and emission-decay investigation of highly concentrated (up to 9 at. %) Nd:YAG ceramics indicates that the state Nd3+ ion in these materials is similar diluted crystals. increased relative intensities spectral satellites connected with ensembles Nd ions near-lattice sites at high concentrations CNd consistent predictions statistics random placement available lattice sites. room-temperature transmission spectra show resonant pump emitting level 4F3/2,...
Defining pathways to assemble long-range-ordered 2D nanostructures of specifically designed organic molecules is required in order optimize the performance thin-film electronic devices. We report on rapid fabrication a nearly perfect self-assembled monolayer (SAM) composed single-domain 6,13-dichloropentacene (DCP) brick-wall pattern Au(788). Scanning tunneling microscopy (STM) results show well-ordered DCP SAM extends over hundreds nanometers. Combining STM with insights from density...
Abstract Background Investigating the context of trauma and acute care surgery, article aims at understanding factors that can enhance some ethical aspects, namely importance patient consent, perceptiveness role leader, perceived ethics as an educational subject. Methods The employs international questionnaire promoted by World Society Emergency Surgery. Results Through analysis 402 fully filled questionnaires surgeons from 72 different countries, three main topics are investigated through...
We report first-principles calculations of acoustic surface plasmons on the (0001) Be, as obtained in random-phase approximation many-body theory. The energy dispersion these collective excitations has been along two symmetry directions. Our results show a considerable anisotropy plasmons, and underline capability experimental measurements to {\it map} electron-hole excitation spectrum quasi two-dimensional Shockley state band that is present Be(0001) surface.
We describe the design and performance of a fast-scanning, variable temperature scanning tunneling microscope (STM) operating from 80 to 700 K in ultrahigh vacuum (UHV), which routinely achieves large scale atomically resolved imaging compact metallic surfaces. An efficient in-vacuum vibration isolation cryogenic system allows for no external UHV chamber. The sample holder STM head permits same nanometer-size area before after preparation outside base. Refractory metal samples are frequently...
Self-ordering growth of nanoarrays on strained metallic interfaces is an attractive option for preparing highly ordered nanotemplates. The great potential this natural templating approach that symmetry, feature sizes, and density are predicted to depend the interfacial stress in these layers, which can be adjusted by changing substrate-thin film composition, temperature, adlayer coverage. This bottom-up growing nanostructured two-dimensional arrays clusters misfit dislocation networks thin...
Abstract We present results of 2D particle-in-cell (PIC) simulations carbon ion acceleration by 10 petawatt (PW) laser pulses, studying both circular polarized (CP) and linear (LP) pulses. carry out a thickness scanning solid target to investigate the ideal for mechanisms using PW with an irradiance 5 × 22 W cm −2 . The energy spectra ions electrons their temperature are studied. Additionally, ions, angular divergence is It shown that 120 nm cutoff 3 GeV CP LP respectively. corresponding ~1...
The target normal sheath acceleration is a robust mechanism for proton and ion from solid targets when irradiated by high power laser. Since its discovery extensive studies have been carried out to enhance the process either optimizing laser pulse delivered onto or utilizing with particular features. Targets different morphologies such as geometrical shape (thin foil, cone, spherical, foam-like, etc.), structures (multi-layer, nano- micro-structured periodic striations, rods, pillars, holes,...
Most of the RE<SUP>3+</SUP> optical lines in YAG, at low temperature and concentrations, present two interesting features: a multisite structure Lorenz lineshape inhomogeneous broadened lines. The satellite ions spectra high YAG group P almost equal intensity that was assigned to nonstoichiometric occupation Al<SUP>3+</SUP> octahedral sites (a) by Y<SUP>3+</SUP>. Up now, no reliable explanation anisotropic effects Y<SUP>3+</SUP>(a) on given. In this paper an attempt is made explain...
We report on the method used to tune 10 PW High Power Laser System parameters for optimized laser-target interaction at ELI-NP showing possibility reach 23 W/cm 2 irradiance level.