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31.
Generation of Phase-Locked Pulses from a Seeded Free-Electron Laser
Giovanni De Ninno, 2016, izvirni znanstveni članek

Najdeno v: osebi
Ključne besede: coherent control, zaklepanje faze, laser na proste elektrone
Objavljeno: 01.03.2016; Ogledov: 1912; Prenosov: 0
.pdf Polno besedilo (1,81 MB)

32.
The FERMI free-electron lasers
Giovanni De Ninno, Primož Rebernik Ribič, E. Allaria, 2015, izvirni znanstveni članek

Najdeno v: osebi
Ključne besede: FERMI, laser na proste elektrone, generacija armonik
Objavljeno: 01.03.2016; Ogledov: 2068; Prenosov: 0
.pdf Polno besedilo (733,99 KB)

33.
Single Shot Polarization Characterization of XUV FEL Pulses from Crossed Polarized Undulators
Giovanni De Ninno, E. Ferrari, David Gauthier, 2015, izvirni znanstveni članek

Najdeno v: osebi
Ključne besede: laser na proste elektrone, X-ray, polarizacija
Objavljeno: 01.03.2016; Ogledov: 1776; Prenosov: 111
.pdf Polno besedilo (615,39 KB)

34.
35.
Coherent control with a short-wavelength free-electron laser
Giovanni De Ninno, Primož Rebernik Ribič, K. C. Prince, 2016, izvirni znanstveni članek

Najdeno v: osebi
Ključne besede: Laser na proste elektrone, koherenca, kratka valovna dolžina
Objavljeno: 01.03.2016; Ogledov: 2020; Prenosov: 0
.pdf Polno besedilo (796,06 KB)

36.
Double-configuration grating monochromator for extreme-ultraviolet ultrafast pulses
Giovanni De Ninno, 2014, izvirni znanstveni članek

Najdeno v: osebi
Ključne besede: monokromator, generacija harmonik, koherenca
Objavljeno: 07.03.2016; Ogledov: 1507; Prenosov: 0
.pdf Polno besedilo (183,48 KB)

37.
Orbital-dependent electron dynamics in Fe-pnictide superconductors
A. Thamizhavel, Damjan Krizmancic, Giovanni De Ninno, Jurij Urbančič, Primož Rebernik Ribič, Barbara Ressel, G. Adhikary, Kalobaran Maiti, Matija Stupar, 2018, izvirni znanstveni članek

Opis: We report on orbital-dependent quasiparticle dynamics in EuFe 2 As 2, a parent compound of Fe-based superconductors, and a way to experimentally identify this behavior using time-and angle-resolved photoelectron spectroscopy across the spin density wave transition. We observe two different relaxation timescales for photoexcited d x z/d y z and d x y electrons. While the itinerant d x z/d y z electrons relax faster through the electron-electron scattering channel, d x y electrons form a quasiequilibrium state with the lattice due to their localized character, and the state decays slowly. Our findings suggest that electron correlation in Fe pnictides is an important property, which should carefully be taken into account when describing the electronic properties of both parent and carrier-doped compounds, and therefore establish a strong connection with cuprates
Najdeno v: osebi
Ključne besede: photoelectron dynamics, Fe based superconductors
Objavljeno: 29.11.2018; Ogledov: 1008; Prenosov: 0
.pdf Polno besedilo (2,37 MB)

38.
Ultra-Fast-VUV Photoemission Study of UV Excited 2-Nitrophenol
Petra Rudolf, Luca Poletto, Fabio Frassetto, Paolo Miotti, Antti Kivimak̈i, Monica de Simone, Cesare Grazioli, Barbara Ressel, Giovanni De Ninno, C. Spezzani, Carlo Callegari, Marcello Coreno, A. Ciavardini, Simona Fornarini, Marco Pezzella, Enrico Bodo, Susanna Piccirillo, 2019, izvirni znanstveni članek

Opis: The initial deactivation pathways of gaseous 2-nitrophenol excited at 268 nm were investigated by time-resolved photoelectron spectroscopy (TRPES) with femtosecond-VUV light, produced by a monochromatized high harmonic generation source. TRPES allowed us to obtain new, valuable experimental information about the ultrafast excited-state dynamics of 2-nitrophenol in the gas phase. In accord with recent ab initio on-the-fly nonadiabatic molecular dynamic simulations, our results validate the occurrence of an ultrafast intersystem crossing leading to an intermediate state that decays on a subpicosecond time scale with a branched mechanisms. Two decay pathways are experimentally observed. One probably involves proton transfer, leading to the most stable triplet aci-form of 2-nitrophenol; the second pathway may involve OH rotation. We propose that following intersystem crossing, an ultrafast fragmentation channel leading to OH or HONO loss could also be operative.
Najdeno v: osebi
Ključne besede: Ultrafast photoemission, nitrophenol
Objavljeno: 12.02.2019; Ogledov: 901; Prenosov: 0
.pdf Polno besedilo (1,81 MB)

39.
Photoelectric effect with a twist
Alberto Simoncig, Benedikt Rösner, Barbara Ressel, Oksana Plekan, Najmeh Mirian, Andrej Mihelič, Micheal Meyer, Michele Manfredda, Špela Krušič, Klaus Hansen, Luca Giannessi, Michele Di Fraia, Alexander Demidovich, Christian David, Miltcho B. Danailov, Marcello Coreno, E. Allaria, Primož Rebernik Ribič, Jonas Wätzel, Giovanni De Ninno, Simone Spampinati, Janez Štupar, Matjaž Žitnik, Marco Zangrando, Carlo Callegari, Jamal Berakdar, 2020, izvirni znanstveni članek

Opis: Photons have fixed spin and unbounded orbital angular momentum (OAM). While the former is manifested in the polarization of light, the latter corresponds to the spatial phase distribution of its wavefront1. The distinctive way in which the photon spin dictates the electron motion upon light– matter interaction is the basis for numerous well-established spectroscopies. By contrast, imprinting OAM on a mat- ter wave, specifically on a propagating electron, is gener- ally considered very challenging and the anticipated effect undetectable2. In refs. 3,4, the authors provided evidence of OAM-dependent absorption of light by a bound electron. Here, we seek to observe an OAM-dependent dichroic photo- electric effect, using a sample of He atoms. Surprisingly, we find that the OAM of an optical field can be imprinted coher- ently onto a propagating electron wave. Our results reveal new aspects of light–matter interaction and point to a new kind of single-photon electron spectroscopy.
Najdeno v: osebi
Ključne besede: FEL, OAM, Photoelectric effect
Objavljeno: 09.09.2020; Ogledov: 162; Prenosov: 0
.pdf Polno besedilo (2,45 MB)

40.
Microbunching instability characterization via temporally modulated laser pulses
Giovanni De Ninno, AD Brynes, 2020, izvirni znanstveni članek

Najdeno v: osebi
Ključne besede: Microbunching instability, laser pulses
Objavljeno: 27.10.2020; Ogledov: 87; Prenosov: 0
.pdf Polno besedilo (6,17 MB)

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