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Brillouin scattering self-cancellation

Florez, O ; Jarschel, P F ; Espinel, Y A V ; Cordeiro, C M B ; Mayer Alegre, T P ; Wiederhecker, G S ; Dainese, P

Nature communications, 2016-06, Vol.7 (1), p.11759-11759, Article 11759 [Periódico revisado por pares]

England: Nature Publishing Group

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  • Título:
    Brillouin scattering self-cancellation
  • Autor: Florez, O ; Jarschel, P F ; Espinel, Y A V ; Cordeiro, C M B ; Mayer Alegre, T P ; Wiederhecker, G S ; Dainese, P
  • É parte de: Nature communications, 2016-06, Vol.7 (1), p.11759-11759, Article 11759
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: 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.
  • Editor: England: Nature Publishing Group
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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