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Authors: R. Van Laer, B. Kuyken, D. Van Thourhout, R. Baets
Title: Analysis of enhanced stimulated Brillouin scattering in silicon slot waveguides
Format: International Journal
Publication date: 2/2014
Journal/Conference/Book: Optics Letters
Editor/Publisher: The Optical Society, 
Volume(Issue): 39(5) p.1242-1245
Internal Reference: [N-1548]
DOI:
Download: Download this Publication (582KB) (582KB)

Abstract

Stimulated Brillouin scattering has attracted renewed interest with the promise of highly tailorable integration into the silicon photonics platform. However, significant Brillouin amplification in silicon waveguides has yet to be shown. In an effort to engineer a structure with large photon-phonon coupling, we analyzed both forward and backward Brillouin scattering in high-index-contrast silicon slot waveguides. The calculations predict that gradient forces enhance the Brillouin gain in narrow slots. We estimate a currently feasible gain of about 10^5/(Wm) in horizontal slot waveguides, which is an order of magnitude larger than in a stand-alone silicon wire. Such efficient coupling could enable a host of Brillouin technologies on a mass-producible silicon chip.

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