Route to attosecond nonlinear spectroscopy |
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Authors: | Reiter F Graf U Serebryannikov E E Schweinberger W Fiess M Schultze M Azzeer A M Kienberger R Krausz F Zheltikov A M Goulielmakis E |
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Institution: | Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany. |
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Abstract: | We demonstrate generation of coherent microjoule-scale, low-order harmonic supercontinua in the deep and vacuum ultraviolet (4-9 eV), resulting from the nonlinear transformations of near-single-cycle laser pulses in a gas cell. We show theoretically that their formation is connected to a novel nonlinear regime, holding promise for the generation of powerful deep-UV and vacuum ultraviolet subfemtosecond pulses. Our work opens the route to pump-probe spectroscopy of subfemtosecond-scale valence-shell phenomena in atoms, molecules, and condensed matter. |
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