• Vu, Khu
• Zarifi, Atiyeh
• Marpaung, David
• Eggleton, Benjamin J.
• Liu, Yang
• Mitchell, Arnan
• Ren, Guanghui
• Nguyen, Thach G.
• Morrison, Blair
• Bedoya, Alvaro Casas

Abstract

<p>A range of unique capabilities in optical and microwave signal processing and generation have been demonstrated using stimulated Brillouin scattering (SBS). The need to harness SBS in mass-manufacturable integrated circuits has led to a focus on silicon-based material platforms. Remarkable progress in silicon-based Brillouin waveguides has been made, but results have been hindered by nonlinear losses present at telecommunications wavelengths. Here, we report on a new approach to surpass this issue through the integration of a high Brillouin gain material, As₂S₃, onto a siliconbased chip. We fabricated a compact spiral device within a silicon circuit, achieving an order-of-magnitude improvement in Brillouin amplification. To establish the flexibility of this approach, we fabricated a ring resonator with free spectral range precisely matched to the Brillouin shift, enabling the first demonstration, to our knowledge, of Brillouin lasing in a planar integrated circuit. Combining active photonic components with the SBS devices shown here will enable the creation of compact, mass-manufacturable optical circuits with enhanced functionalities.</p>

Topics

• Silicon