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Title: Generation of isolated soft x-ray attosecond pulses with mid-infrared driving lasers via transient phase-matching gating

Journal Article · · New Journal of Physics

Abstract Isolated attosecond pulses (IAPs) in the soft x-ray (SXR) region are highly desirable for attosecond time-resolved experiments. Here we identify a transient phase matching gating method for the generation of such IAPs with mid-infrared (MIR) lasers. This gating method works when a loosely focused, long-duration MIR Gaussian driving beam is slightly reshaped during its propagation in the gas medium under the ‘critical’ ionization condition. Quantitatively, the calculated coherence length of high harmonic is used to analyze the mechanism of the gating method, by using one-dimensional plane-wave beams and by comparing 2000 nm and 800 nm lasers. The robustness of the generation method is checked by varying laser’s carrier-envelope-phase and gas pressure. This gating method provides with an alternative route to efficiently produce tabletop ultrashort attosecond SXR light sources with the emerging MIR lasers.

Research Organization:
Kansas State Univ., Manhattan, KS (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
FG02-86ER13491
OSTI ID:
1849914
Journal Information:
New Journal of Physics, Vol. 23, Issue 7; ISSN 1367-2630
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

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