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Bright Coherent Ultrahigh Harmonics in the keV X-ray Regime from Mid-Infrared Femtosecond Lasers

Popmintchev, Tenio ; Chen, Ming-Chang ; Popmintchev, Dimitar ; Arpin, Paul ; Brown, Susannah ; Ališauskas, Skirmantas ; Andriukaitis, Giedrius ; Balčiunas, Tadas ; Mücke, Oliver D. ; Pugzlys, Audrius ; Baltuška, Andrius ; Shim, Bonggu ; Schrauth, Samuel E. ; Gaeta, Alexander ; Hernández-García, Carlos ; Plaja, Luis ; Becker, Andreas ; Jaron-Becker, Agnieszka ; Murnane, Margaret M. ; Kapteyn, Henry C.

Science (American Association for the Advancement of Science), 2012-06, Vol.336 (6086), p.1287-1291 [Periódico revisado por pares]

Washington, DC: American Association for the Advancement of Science

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Título:
Bright Coherent Ultrahigh Harmonics in the keV X-ray Regime from Mid-Infrared Femtosecond Lasers
Autor: Popmintchev, Tenio ; Chen, Ming-Chang ; Popmintchev, Dimitar ; Arpin, Paul ; Brown, Susannah ; Ališauskas, Skirmantas ; Andriukaitis, Giedrius ; Balčiunas, Tadas ; Mücke, Oliver D. ; Pugzlys, Audrius ; Baltuška, Andrius ; Shim, Bonggu ; Schrauth, Samuel E. ; Gaeta, Alexander ; Hernández-García, Carlos ; Plaja, Luis ; Becker, Andreas ; Jaron-Becker, Agnieszka ; Murnane, Margaret M. ; Kapteyn, Henry C.
Assuntos: Atoms ; Beam characteristics: profile, intensity, and power; spatial pattern formation ; Beams (radiation) ; Coherence ; Conversion ; Electrons ; Exact sciences and technology ; Femtosecond ; Frequency conversion ; harmonic generation, including high-order harmonic generation ; Fundamental areas of phenomenology (including applications) ; Gas pressure ; Gases ; Harmonic analysis ; Harmonics ; Ionization ; Laser beams ; Laser optical systems: design and operation ; Lasers ; Light ; Musical Instruments ; Nonlinear optics ; Optics ; Optimization ; Phase matching ; Photons ; Physics ; Strings ; Ultrafast processes; optical pulse generation and pulse compression ; Wave optics ; Wavelengths ; X-rays
É parte de: Science (American Association for the Advancement of Science), 2012-06, Vol.336 (6086), p.1287-1291
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: High-harmonic generation (HHG) traditionally combines ~100 near-infrared laser photons to generate bright, phase-matched, extreme ultraviolet beams when the emission from many atoms adds constructively. Here, we show that by guiding a mid-infrared femtosecond laser in a high-pressure gas, ultrahigh harmonics can be generated, up to orders greater than 5000, that emerge as a bright supercontinuum that spans the entire electromagnetic spectrum from the ultraviolet to more than 1.6 kilo-electron volts, allowing, in principle, the generation of pulses as short as 2.5 attoseconds. The multiatmosphere gas pressures required for bright, phase-matched emission also support laser beam self-confinement, further enhancing the x-ray yield. Finally, the x-ray beam exhibits high spatial coherence, even though at high gas density the recolliding electrons responsible for HHG encounter other atoms during the emission process.
Editor: Washington, DC: American Association for the Advancement of Science
Idioma: Inglês

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Bright Coherent Ultrahigh Harmonics in the keV X-ray Regime from Mid-Infrared Femtosecond Lasers

Washington, DC: American Association for the Advancement of Science

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