Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/320521
Type: Artigo de Periódico
Title: Brillouin Scattering Self-cancellation
Author: Florez
O; Jarschel
PF; Espinel
YAV; Cordeiro
CMB; Alegre
TPM; Wiederhecker
GS; 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: Microwave Photonic Filter
Acoustic Phonons
Optical-fibers
Light-scattering
Crystal Fibers
Wave-guides
Slow Light
Oscillator
Nanowire
Editor: NATURE PUBLISHING GROUP
Citation: Nature Communications. NATURE PUBLISHING GROUP, n. 7, n. 11759, p. .
Rights: aberto
Identifier DOI: 10.1038/ncomms11759
Address: http://www-nature-com.ez88.periodicos.capes.gov.br/articles/ncomms11759
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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