Coherent control with a short-wavelength Free Electron Laser
Abstract
XUV 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 utilised for many experiments previously possible at long wavelengths only: multiphoton ionization, pumping an atomic laser, and four-wave mixing spectroscopy. However one important optical technique, coherent control, has not yet been demonstrated, because Self- Amplified Spontaneous Emission FELs have limited longitudinal coherence. Single-colour pulses from the FERMI seeded FEL are longitudinally coherent, 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 the asymmetry of the photoelectron angular distribution was controlled by adjusting the phase, with temporal resolution 3 attoseconds. This opens the door to new shortwavelength coherent control experiments with ultrahigh time resolution and chemical sensitivity.
Cite
@article{arxiv.1701.03387,
title = {Coherent control with a short-wavelength Free Electron Laser},
author = {K. C. Prince and E. Allaria and C. Callegari and R. Cucini and G. De Ninno and S. Di Mitri and B. Diviacco and E. Ferrari and P. Finetti and D. Gauthier and L. Giannessi and N. Mahne and G. Penco and O. Plekan and L. Raimondi and P. Rebernik and E. Roussel and C. Svetina and M. Trovò and M. Zangrando and M. Negro and P. Carpeggiani and M. Reduzzi and G. Sansone and A. N. Grum-Grzhimailo and E. V. Gryzlova and S. I. Strakhova and K. Bartschat and N. Douguet and J. Venzke and D. Iablonskyi and Y. Kumagai and T. Takanashi and K. Ueda and A. Fischer and M. Coreno and F. Stienkemeier and Y. Ovcharenko and T. Mazza and M. Meyer},
journal= {arXiv preprint arXiv:1701.03387},
year = {2017}
}