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Start date: 2020 × DDC: 530 × Publisher: [London] : IOP × Subject: high harmonic generation × Subject: optical and molecular physics ×

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    Phase cycling of extreme ultraviolet pulse sequences generated in rare gases
    ([London] : IOP, 2020) Wituschek, Andreas; Kornilov, Oleg; Witting, Tobias; Maikowski, Laura; Stienkemeier, Frank; Vrakking, Marc J.J.; Bruder, Lukas
    The development of schemes for coherent nonlinear time-domain spectroscopy in the extreme-ultraviolet regime (XUV) has so far been impeded by experimental difficulties that arise at these short wavelengths. In this work we present a novel experimental approach, which facilitates the timing control and phase cycling of XUV pulse sequences produced by harmonic generation in rare gases. The method is demonstrated for the generation and high spectral resolution characterization of narrow-bandwidth harmonics (˜14 eV) in argon and krypton. Our technique simultaneously provides high phase stability and a pathway-selective detection scheme for nonlinear signals - both necessary prerequisites for all types of coherent nonlinear spectroscopy. © 2020 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.