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Journal Articles Nature Photonics Year : 2015

Table-top femtosecond soft X-ray laser by collisional ionization gating

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F. Tissandier
Jean-Philippe Goddet
Kim Ta Phuoc
C. Thaury
Alessandro Flacco
B. Vodungbo
Guillaume Lambert
Antoine Rousse
Philippe Zeitoun
Stéphane Sebban

Abstract

The advent of X-ray free-electron lasers has granted researchers an unprecedented access to the ultrafast dynamics of matter on the nanometre scale(1-3). Aside from being compact, seeded plasma-based soft X-ray lasers (SXRLs) turn out to be enticing as photon-rich(4) sources (up to 10(15) per pulse) that display high-quality optical properties(5,6). Hitherto, the duration of these sources was limited to the picosecond range(7), which consequently restricts the field of applications. This bottleneck was overcome by gating the gain through ultrafast collisional ionization in a high-density plasma generated by an ultraintense infrared pulse (a few 10(18) W cm(-2)) guided in an optically pre-formed plasma waveguide. For electron densities that ranged from 3 x 10(18) cm(-3) to 1.2 x 10(20) cm(-3), the gain duration was measured to drop from 7 ps to an unprecedented value of about 450 fs, which paves the way to compact and ultrafast SXRL beams with performances previously only accessible in large-scale facilities.
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Dates and versions

hal-01394716 , version 1 (09-11-2016)

Identifiers

Cite

Adrien Depresseux, Eduardo Oliva, Julien Gautier, F. Tissandier, J. Nejdl, et al.. Table-top femtosecond soft X-ray laser by collisional ionization gating. Nature Photonics, 2015, 9 (12), pp.817 - 821. ⟨10.1038/NPHOTON.2015.225⟩. ⟨hal-01394716⟩
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