Attosecond lighthouse driven by sub-two-cycle, 1.8μm laser pulses

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Abstract
We generate space-time coupled attosecond pulse trains with a 1.8 μ m wavelength laser pulse using the ‘attosecond lighthouse’ technique. We show low divergence, spatially well-separated beamlets from low ionization potential gas media. We also find that there is little long trajectory contribution—only the short trajectory contribution is clearly visible for any beamlet. These results open a new route for extending attosecond technology to higher cut off energy and shorter pulse duration.
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  • Natural Sciences and Engineering Research Council of Canada
  • Defense Advanced Research Projects Agency
  • Air Force Office of Scientific Research

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