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Giant narrowband twin-beam generation along the pump-energy propagation direction

Author

Listed:
  • Angela M. Pérez

    (Max Planck Institute for the Science of Light
    Institute of Optics, Information and Photonics, University of Erlangen-Nürnberg)

  • Kirill Yu Spasibko

    (Max Planck Institute for the Science of Light
    Institute of Optics, Information and Photonics, University of Erlangen-Nürnberg
    M.V. Lomonosov Moscow State University)

  • Polina R. Sharapova

    (M.V. Lomonosov Moscow State University)

  • Olga V. Tikhonova

    (M.V. Lomonosov Moscow State University)

  • Gerd Leuchs

    (Max Planck Institute for the Science of Light
    Institute of Optics, Information and Photonics, University of Erlangen-Nürnberg)

  • Maria V. Chekhova

    (Max Planck Institute for the Science of Light
    Institute of Optics, Information and Photonics, University of Erlangen-Nürnberg
    M.V. Lomonosov Moscow State University)

Abstract

Walk-off effects, originating from the difference between the group and phase velocities, limit the efficiency of nonlinear optical interactions. While transverse walk-off can be eliminated by proper medium engineering, longitudinal walk-off is harder to avoid. In particular, ultrafast twin-beam generation via pulsed parametric down-conversion and four-wave mixing is only possible in short crystals or fibres. Here we show that in high-gain parametric down-conversion, one can overcome the destructive role of both effects and even turn them into useful tools for shaping the emission. In our experiment, one of the twin beams is emitted along the pump Poynting vector or its group velocity matches that of the pump. The result is markedly enhanced generation of both twin beams, with the simultaneous narrowing of angular and frequency spectrum. The effect will enable efficient generation of ultrafast twin photons and beams in cavities, waveguides and whispering-gallery mode resonators.

Suggested Citation

  • Angela M. Pérez & Kirill Yu Spasibko & Polina R. Sharapova & Olga V. Tikhonova & Gerd Leuchs & Maria V. Chekhova, 2015. "Giant narrowband twin-beam generation along the pump-energy propagation direction," Nature Communications, Nature, vol. 6(1), pages 1-5, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8707
    DOI: 10.1038/ncomms8707
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