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Type: Artigo
Title: Brillouin scattering self-cancellation
Author: Florez, O.
Jarschel, P. F.
Espinel, Y. A. V.
Cordeiro, C. M. B.
Alegre, T. P. Mayer
Wiederhecker, G. S.
Dainese, P.
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.
Subject: Nanofios
Country: Reino Unido
Editor: Nature Publishing Group
Citation: Nature Communications. Nature Publishing Group, v. 7, p. , 2016.
Rights: aberto
Identifier DOI: 10.1038/ncomms11759
Date Issue: 2016
Appears in Collections:IFGW - Artigos e Outros Documentos

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