ARRAW: anti-resonant reflecting acoustic waveguides. (1st May 2020)

• Record Type: Journal Article
• Authors: Schmidt, M K; O'Brien, M C; Steel, M J; Poulton, C G
• Is Part Of: New journal of physics. Volume 22:Number 5(2020:May)
• Publication Date: 2020-05-01
• Subjects: acoustic waveguides -- Brillouin scattering -- nonlinear optics; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/ab7d79
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: Development of acoustic and optoacoustic on-chip technologies calls for new solutions to guiding, storing and interfacing acoustic and optical waves in integrated silicon-on-insulator systems. One of the biggest challenges in this field is to suppress the radiative dissipation of the propagating acoustic waves, while co-localizing the optical and acoustic fields in the same region of an integrated waveguide. Here we address this problem by introducing anti-resonant reflecting acoustic waveguides (ARRAWs)—mechanical analogues of the anti-resonant reflecting optical waveguides. We discuss the principles of anti-resonant guidance and establish guidelines for designing efficient ARRAWs. Finally, we demonstrate examples of the simplest silicon/silica ARRAW platforms that can simultaneously serve as near-IR optical waveguides, and support strong backward Brillouin scattering.