Primož Rebernik Ribič (Avtor), Alessandro Abrami (Avtor), Laura Badano (Avtor), Maurizio Bossi (Avtor), Hans-Heinrich Braun (Avtor), Niky Bruchon (Avtor), Flavio Capotondi (Avtor), Davide Castronovo (Avtor), Marco Cautero (Avtor), Paolo Cinquegrana (Avtor), Giovanni De Ninno (Avtor)

Povzetek

X-ray free-electron lasers (FELs), which amplify light emitted by a relativistic electron beam, are extending nonlinear optical techniques to shorter wavelengths, adding element specificity by exciting and probing electronic transitions from core levels. These techniques would benefit tremendously from having a stable FEL source, generating spectrally pure and wavelength-tunable pulses. We show that such requirements can be met by operating the FEL in the so-called echo-enabled harmonic generation (EEHG) configuration. Here, two external conventional lasers are used to precisely tailor the longitudinal phase space of the electron beam before emission of X-rays. We demonstrate high-gain EEHG lasing producing stable, intense, nearly fully coherent pulses at wavelengths as short as 5.9 nm (~211 eV) at the FERMI FEL user facility. Low sensitivity to electron-beam imperfections and observation of stable, narrow-band, coherent emission down to 2.6 nm (~474 eV) make the technique a prime candidate for generating laser-like pulses in the X-ray spectral region, opening the door to multidimensional coherent spectroscopies at short wavelengths.

Ključne besede

laserji na proste elektrone;koherenca;rentgenski žarki;free electron laser;coherence;x-rays;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UNG - Univerza v Novi Gorici
UDK: 53
COBISS: 5380859 Povezava se bo odprla v novem oknu
ISSN: 1749-4885
Št. ogledov: 2622
Št. prenosov: 0
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

URN: URN:SI:UNG
Vrsta dela (COBISS): Delo ni kategorizirano
Strani: str. 555-561
Letnik: ǂVol. ǂ13
Zvezek: ǂiss. ǂ8
Čas izdaje: 2019
DOI: 10.1038/s41566-019-0427-1
ID: 11132571