Large Brillouin Amplification in Silicon

Abstract

Strong Brillouin coupling has only recently been realized in silicon using a new class of optomechanical waveguides that yield both optical and phononic confinement. Despite these major advances, appreciable Brillouin amplification has yet to be observed in silicon. Using a new membrane-suspended silicon waveguide we report large Brillouin amplification for the first time, reaching levels greater than 5 dB for modest pump powers, and demonstrate a record low (5 mW) threshold for net amplification. This work represents a crucial advance necessary to realize high-performance Brillouin lasers and amplifiers in silicon.

References in corpus (6)

• Non-Reciprocal Brillouin Scattering Induced Transparency
• Interaction between light and highly confined hypersound in a silicon photonic nanowire
• Control of coherent information via on chip photonic-phononic emitter-receivers
• Net on-chip Brillouin gain based on suspended silicon nanowires
• Brillouin resonance broadening due to structural variations in nanoscale waveguides
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