Ultrafast Self-Induced X-Ray Transparency and Loss of Magnetic Diffraction

Z Chen; D J Higley; M Beye; M Hantschmann; V Mehta; O Hellwig; A Mitra; S Bonetti; M Bucher; S Carron; T Chase; E Jal; R Kukreja; T Liu; A H Reid; G L Dakovski; A Föhlisch; W F Schlotter; H A Dürr; J Stöhr

doi:10.1103/PhysRevLett.121.137403

Ultrafast Self-Induced X-Ray Transparency and Loss of Magnetic Diffraction

Phys Rev Lett. 2018 Sep 28;121(13):137403. doi: 10.1103/PhysRevLett.121.137403.

Authors

Z Chen¹, D J Higley², M Beye³, M Hantschmann⁴, V Mehta⁵, O Hellwig^{6

7}, A Mitra^{8

9}, S Bonetti¹⁰, M Bucher⁸, S Carron⁸, T Chase², E Jal⁸, R Kukreja¹¹, T Liu¹, A H Reid⁸, G L Dakovski⁸, A Föhlisch⁴, W F Schlotter⁸, H A Dürr^{8

12}, J Stöhr¹³

Affiliations

¹ Department of Physics, Stanford University, Stanford, California 94305, USA.
² Department of Applied Physics, Stanford University, Stanford, California 94305, USA.
³ Department of Photon Science, DESY, Notkestraße 85, D-22607 Hamburg, Germany.
⁴ Department of Materials and Energy Science, Helmholtz Zentrum Berlin, D-14109 Berlin, Germany.
⁵ San Jose Research Center, HGST a Western Digital company, San Jose, California 95135, USA.
⁶ Institute of Physics, Technische Universität Chemnitz, D-09107 Chemnitz, Germany.
⁷ Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany.
⁸ SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
⁹ Department of Physics, University of Warwick, CV4 7AL Coventry, United Kingdom.
¹⁰ Department of Physics, Stockholm University, S-10691 Stockholm, Sweden.
¹¹ Department of Materials Science and Engineering, University of California Davis, Davis, California 95616, USA.
¹² Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden.
¹³ SLAC National Accelerator Laboratory and Department of Photon Science, Stanford, California 94035, USA.

PMID: 30312105
DOI: 10.1103/PhysRevLett.121.137403

Abstract

Using ultrafast ≃2.5 fs and ≃25 fs self-amplified spontaneous emission pulses of increasing intensity and a novel experimental scheme, we report the concurrent increase of stimulated emission in the forward direction and loss of out-of-beam diffraction contrast for a Co/Pd multilayer sample. The experimental results are quantitatively accounted for by a statistical description of the pulses in conjunction with the optical Bloch equations. The dependence of the stimulated sample response on the incident intensity, coherence time, and energy jitter of the employed pulses reveals the importance of increased control of x-ray free electron laser radiation.