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Echoes of photons past

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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.

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Figure 1: Harmonic echoes in an electron beam.

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Authors and Affiliations

  1. Department of Physics, Lawrence T. Campbell and Brian W. J. McNeil are at SUPA, University of Strathclyde, Glasgow G4 0NG, UK,

    Lawrence T. Campbell & Brian W. J. McNeil

  2. Lawrence T. Campbell is also at ASTeC, STFC Daresbury Laboratory and Cockcroft Institute, Warrington WA4 4AD, UK,

    Lawrence T. Campbell

Authors
  1. Lawrence T. Campbell
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  2. Brian W. J. McNeil
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Correspondence to Brian W. J. McNeil.

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Campbell, L., McNeil, B. Echoes of photons past. Nature Photon 10, 501–502 (2016). https://doi.org/10.1038/nphoton.2016.145

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