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Brillouin scattering self-cancellation

Author

Listed:
  • O. Florez

    (Gleb Wataghin Physics Institute, University of Campinas)

  • P. F. Jarschel

    (Gleb Wataghin Physics Institute, University of Campinas)

  • Y. A. V. Espinel

    (Gleb Wataghin Physics Institute, University of Campinas)

  • C. M. B. Cordeiro

    (Gleb Wataghin Physics Institute, University of Campinas)

  • T. P. Mayer Alegre

    (Gleb Wataghin Physics Institute, University of Campinas)

  • G. S. Wiederhecker

    (Gleb Wataghin Physics Institute, University of Campinas)

  • P. Dainese

    (Gleb Wataghin Physics Institute, University of Campinas)

Abstract

The interaction between light and acoustic phonons is strongly modified in sub-wavelength confinement, and has led to the demonstration and control of Brillouin scattering in photonic structures such as nano-scale optical waveguides and cavities. Besides the small optical mode volume, two physical mechanisms come into play simultaneously: a volume effect caused by the strain-induced refractive index perturbation (known as photo-elasticity), and a surface effect caused by the shift of the optical boundaries due to mechanical vibrations. As a result, proper material and structure engineering allows one to control each contribution individually. Here, we experimentally demonstrate the perfect cancellation of Brillouin scattering arising from Rayleigh acoustic waves by engineering a silica nanowire with exactly opposing photo-elastic and moving-boundary effects. This demonstration provides clear experimental evidence that the interplay between the two mechanisms is a promising tool to precisely control the photon–phonon interaction, enhancing or suppressing it.

Suggested Citation

  • O. Florez & P. F. Jarschel & Y. A. V. Espinel & C. M. B. Cordeiro & T. P. Mayer Alegre & G. S. Wiederhecker & P. Dainese, 2016. "Brillouin scattering self-cancellation," Nature Communications, Nature, vol. 7(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11759
    DOI: 10.1038/ncomms11759
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    Cited by:

    1. Fan Yang & Flavien Gyger & Adrien Godet & Jacques Chrétien & Li Zhang & Meng Pang & Jean-Charles Beugnot & Luc Thévenaz, 2022. "Large evanescently-induced Brillouin scattering at the surrounding of a nanofibre," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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