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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Brillouin scattering self-cancellation

Full text
Author(s):
Florez, O. [1] ; Jarschel, P. F. [1] ; Espinel, Y. A. V. [1] ; Cordeiro, C. M. B. [1] ; Mayer Alegre, T. P. [1] ; Wiederhecker, G. S. [1] ; Dainese, P. [1]
Total Authors: 7
Affiliation:
[1] Univ Estadual Campinas, Gleb Wataghin Phys Inst, BR-13083859 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: NATURE COMMUNICATIONS; v. 7, JUN 2016.
Web of Science Citations: 42
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. (AU)

FAPESP's process: 08/57857-2 - Photonics for optical communications
Grantee:Hugo Luis Fragnito
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 12/17765-7 - Nanophotonics in Group IV and III-V semiconductors
Grantee:Gustavo Silva Wiederhecker
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 12/17610-3 - Optomechanics in photonic and phononic crystals
Grantee:Thiago Pedro Mayer Alegre
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 13/20180-3 - Light scattering processes in photonic microstructures
Grantee:Paulo Clóvis Dainese Júnior
Support Opportunities: Research Grants - Young Investigators Grants