Free-electron lasers : echoes of photons past

Campbell, Lawrence T. and McNeil, Brian W. J. (2016) Free-electron lasers : echoes of photons past. Nature Photonics, 10. pp. 501-502. ISSN 1749-4885

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    Abstract

    High-harmonic generation is an established method to significantly upshift laser photon energies. Now, researchers at the SLAC National Accelerator Laboratory have used echo concepts to generate coherent high-harmonic output from an electron-beam light source.