Brillouin scattering self-cancellation

被引：84

作者：

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
]}

机构：

[1] Univ Estadual Campinas, Gleb Wataghin Phys Inst, BR-13083859 Campinas, SP, Brazil

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

基金：

巴西圣保罗研究基金会;

关键词：

MICROWAVE PHOTONIC FILTER; ACOUSTIC PHONONS; OPTICAL-FIBERS; LIGHT-SCATTERING; CRYSTAL FIBERS; WAVE-GUIDES; OSCILLATOR; NANOWIRE; SLOW;

D O I：

10.1038/ncomms11759

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：8

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