Infrared Physics & Technology, Journal Year: 2024, Volume and Issue: 140, P. 105354 - 105354
Published: May 21, 2024
Language: Английский
Optica, Journal Year: 2024, Volume and Issue: 11(8), P. 1085 - 1085
Published: July 1, 2024
The landscape of ultrafast structured light pulses has significantly advanced thanks to the ability high-order harmonic generation (HHG) translate spatial properties infrared laser beams extreme-ultraviolet (EUV) spectral range. In particular, up-conversion orbital angular momentum (OAM) enabled harmonics whose OAM scales linearly with order and topological charge driving field. Having a well-defined OAM, each is emitted as an EUV femtosecond vortex pulse. However, order-dependent across comb precludes synthesis attosecond pulses. Here we demonstrate method for generating pulse trains, i.e., succession helical wavefront, resulting from coherent superposition same OAM. By HHG polarization tilt-angle fork grating, two spatially separated circularly polarized order-independent are created. Our work opens route towards attosecond-resolved light-matter interactions extra degrees freedom, spin which particularly interesting probing chiral systems magnetic materials.
Language: Английский
Citations
5
Nature Reviews Methods Primers, Journal Year: 2025, Volume and Issue: 5(1)
Published: May 2, 2025
Citations
0
Physical review. B./Physical review. B, Journal Year: 2024, Volume and Issue: 110(17)
Published: Nov. 6, 2024
We have generated elliptically polarized femtosecond pulses from a seeded free-electron laser (FEL) in the spectral range 700–800 eV and conducted demonstrative experiments based on magnetic circular dichroism, at Fe L3 edge. This was achieved by making use of radiation produced third harmonic fundamental FEL wavelength λ. A planar radiator emits linearly harmonics along undulator axis, while helical produces off-axis with polarization. However, circularly light is characterized rather low flux and, as result, it unsuitable for most that rely dichroism. Here, we demonstrate on-axis substantial degree polarization λ/3 can be using variable-polarization (APPLE-type) radiator, finely tuned hybrid-polarization mode. The experiments, which potential adopted configuration dichroism studies, were carried out FERMI facility Trieste (Italy). These results pave way to 2p−3d resonances transition metals relevant studies (Fe, Co, Ni) make possible envisage investigations, e.g., spectroscopic different core-hole lifetimes, covering both M (50–70 eV) L (600–900 edges, same source.Received 8 March 2024Revised 18 August 2024Accepted 23 September 2024DOI:https://doi.org/10.1103/PhysRevB.110.174409©2024 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasDemagnetizationMagnetic orderMagnetic textureMagnetismSpin dynamicsCondensed Matter, Materials & Applied Physics
Language: Английский
Citations
2
Chinese Journal of Lasers, Journal Year: 2024, Volume and Issue: 51(17), P. 1701001 - 1701001
Published: Jan. 1, 2024
Citations
1
Chinese Journal of Lasers, Journal Year: 2024, Volume and Issue: 51(19), P. 1915002 - 1915002
Published: Jan. 1, 2024
Citations
1
Review of Scientific Instruments, Journal Year: 2023, Volume and Issue: 94(6)
Published: June 1, 2023
We present a laser-driven, bright, and broadband (50 to 1500 eV) soft-x-ray plasma source with <10 ps pulse duration. This is employed in two complementary, laboratory-scale beamlines for time-resolved, magnetic resonant scattering spectroscopy, as well near-edge x-ray absorption fine-structure (NEXAFS) spectroscopy. In both beamlines, dedicated reflection zone plates (RZPs) are used single optical elements capture, disperse, focus the soft x rays, reaching resolving powers up E/ΔE > 1000, hybrid RZPs at NEXAFS beamline retaining consistent 500 throughout full spectral range, allowing time-efficient data acquisition. demonstrate versatility performance of our setup by selection spectroscopy experiments, which so far have not been possible on laboratory scale. Excellent quality, combined experimental flexibility, renders approach true alternative large-scale facilities, such synchrotron-radiation sources free-electron lasers.
Language: Английский
Citations
2
Optics Express, Journal Year: 2024, Volume and Issue: 32(11), P. 19076 - 19076
Published: May 1, 2024
We present a method for achieving hyperspectral magnetic imaging in the extreme ultraviolet (EUV) region based on high-harmonic generation (HHG). By interfering two mutually coherent orthogonally-polarized and laterally-sheared HHG sources, we create an EUV illumination beam with spatially-dependent ellipticity. placing sample beamline sweeping relative time delay between record spatially resolved interferogram that is sensitive to circular dichroism of sample. This image contains spatially-resolved magneto-optical response at each harmonic order, can be used measure properties inhomogeneous samples.
Language: Английский
Citations
0
Infrared Physics & Technology, Journal Year: 2024, Volume and Issue: 140, P. 105354 - 105354
Published: May 21, 2024
Language: Английский
Citations
0