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Holographic free-electron light source

Author

Listed:
  • Guanhai Li

    (Optoelectronics Research Centre & Centre for Photonic Metamaterials, University of Southampton
    National Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences)

  • Brendan P. Clarke

    (Optoelectronics Research Centre & Centre for Photonic Metamaterials, University of Southampton)

  • Jin-Kyu So

    (Optoelectronics Research Centre & Centre for Photonic Metamaterials, University of Southampton
    Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences & The Photonics Institute, Nanyanag Technological University)

  • Kevin F. MacDonald

    (Optoelectronics Research Centre & Centre for Photonic Metamaterials, University of Southampton)

  • Nikolay I. Zheludev

    (Optoelectronics Research Centre & Centre for Photonic Metamaterials, University of Southampton
    Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences & The Photonics Institute, Nanyanag Technological University)

Abstract

Recent advances in the physics and technology of light generation via free-electron proximity and impact interactions with nanostructures (gratings, photonic crystals, nano-undulators, metamaterials and antenna arrays) have enabled the development of nanoscale-resolution techniques for such applications as mapping plasmons, studying nanoparticle structural transformations and characterizing luminescent materials (including time-resolved measurements). Here, we introduce a universal approach allowing generation of light with prescribed wavelength, direction, divergence and topological charge via point-excitation of holographic plasmonic metasurfaces. It is illustrated using medium-energy free-electron injection to generate highly-directional visible to near-infrared light beams, at selected wavelengths in prescribed azimuthal and polar directions, with brightness two orders of magnitude higher than that from an unstructured surface, and vortex beams with topological charge up to ten. Such emitters, with micron-scale dimensions and the freedom to fully control radiation parameters, offer novel applications in nano-spectroscopy, nano-chemistry and sensing.

Suggested Citation

  • Guanhai Li & Brendan P. Clarke & Jin-Kyu So & Kevin F. MacDonald & Nikolay I. Zheludev, 2016. "Holographic free-electron light source," Nature Communications, Nature, vol. 7(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13705
    DOI: 10.1038/ncomms13705
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