Attosecond interferometry with self-amplified spontaneous emission of a free-electron laser

Sergey Usenko, Andreas Przystawik, Markus Alexander Jakob, Leslie Lamberto Lazzarino, Günter Brenner, Sven Toleikis, Christian Haunhorst, Detlef Kip and Tim Laarmann ()
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Sergey Usenko: Deutsches Elektronen-Synchrotron DESY
Andreas Przystawik: Deutsches Elektronen-Synchrotron DESY
Markus Alexander Jakob: The Hamburg Centre for Ultrafast Imaging CUI
Leslie Lamberto Lazzarino: University of Hamburg
Günter Brenner: Deutsches Elektronen-Synchrotron DESY
Sven Toleikis: Deutsches Elektronen-Synchrotron DESY
Christian Haunhorst: Faculty of Electrical Engineering, Helmut Schmidt University
Detlef Kip: Faculty of Electrical Engineering, Helmut Schmidt University
Tim Laarmann: Deutsches Elektronen-Synchrotron DESY

Nature Communications, 2017, vol. 8, issue 1, 1-6

Abstract: Abstract Light-phase-sensitive techniques, such as coherent multidimensional spectroscopy, are well-established in a broad spectral range, already spanning from radio-frequencies in nuclear magnetic resonance spectroscopy to visible and ultraviolet wavelengths in nonlinear optics with table-top lasers. In these cases, the ability to tailor the phases of electromagnetic waves with high precision is essential. Here we achieve phase control of extreme-ultraviolet pulses from a free-electron laser (FEL) on the attosecond timescale in a Michelson-type all-reflective interferometric autocorrelator. By varying the relative phase of the generated pulse replicas with sub-cycle precision we observe the field interference, that is, the light-wave oscillation with a period of 129 as. The successful transfer of a powerful optical method towards short-wavelength FEL science and technology paves the way towards utilization of advanced nonlinear methodologies even at partially coherent soft X-ray FEL sources that rely on self-amplified spontaneous emission.

Date: 2017
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DOI: 10.1038/ncomms15626

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