Journal
NATURE PHOTONICS
Volume 10, Issue 3, Pages 176-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2016.13
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Funding
- Central Europe Programme
- Alexander von Humboldt Foundation
- Italian Ministry of Research [RBID08CRXK, PRIN 2010ERFKXL_006]
- European Union Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [641789]
- US National Science Foundation [PHY-1430245, XSEDE-090031]
- X-ray Free Electron Laser Priority Strategy Program of MEXT
- IMRAM, Tohoku University
- Deutsche Forschungsgemeinschaft (DFG) [SFB 925/A1, SFB 925/A3]
- European XFEL
- ERC Starting Research Grant UDYNI [307964]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1403245] Funding Source: National Science Foundation
- European Research Council (ERC) [307964] Funding Source: European Research Council (ERC)
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Extreme ultraviolet and X-ray free-electron lasers (FELs) produce short-wavelength pulses with high intensity, ultrashort duration, well-defined polarization and transverse coherence, and have been utilized for many experiments previously possible only at long wavelengths: multiphoton ionization(1), pumping an atomic laser(2) and four-wave mixing spectroscopy(3). However one important optical technique, coherent control, has not yet been demonstrated, because self-amplified spontaneous emission FELs have limited longitudinal coherence(4-7). Single-colour pulses from the FERMI seeded FEL are longitudinally coherent8,9, and two-colour emission is predicted to be coherent. Here, we demonstrate the phase correlation of two colours, and manipulate it to control an experiment. Light of wavelengths 63.0 and 31.5 nm ionized neon, and we controlled the asymmetry of the photoelectron angular distribution(10,11) by adjusting the phase, with a temporal resolution of 3 as. This opens the door to new short-wavelength coherent control experiments with ultrahigh time resolution and chemical sensitivity.
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