Bright, coherent, ultrafast soft X-ray harmonics spanning the water window from a tabletop light source.

Phys Rev Lett 2010 Oct 19;105(17):173901. Epub 2010 Oct 19.

JILA, University of Colorado at Boulder, 80309-0440, USA.

We demonstrate fully phase-matched high harmonic emission spanning the water window spectral region important for nano- and bioimaging and a breadth of materials and molecular dynamics studies. We also generate the broadest bright coherent bandwidth (≈300  eV) to date from any light source, small or large, that is consistent with a single subfemtosecond burst. The harmonic photon flux at 0.5 keV is 10³ higher than demonstrated previously. This work extends bright, spatially coherent, attosecond pulses into the soft x-ray region for the first time.

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http://dx.doi.org/10.1103/PhysRevLett.105.173901DOI Listing
October 2010
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