Transactions in Theoretical and Mathematical Physics

Transactions in Theoretical and Mathematical Physics

Numerical Study of a Nanoscale Waveguide with Brillouin Scattering

Document Type : Original Article

Author
School Of Engineering Science, College of Engineering, University of Tehran
Abstract
Stimulated Brillouin scattering (SBS) arises from the interaction between light and sound waves. In partially suspended waveguides, reduced substrate contact enhances optical and acoustic confinement, improving SBS efficiency. This study uses two-dimensional finite element simulations to analyze SBS in a silicon waveguide anchored by a silica pillar. Both forward and backward SBS are explored across a broad frequency range. Optimizing the pillar width significantly increases SBS gain, mainly through the photoelastic effect, with minor moving boundary contributions. The results emphasize the importance of structural design in enhancing SBS for high-performance integrated photonic applications.
Keywords
Subjects

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Volume 2, Issue 3
Summer 2025
Pages 116-122

  • Receive Date 07 July 2025
  • Accept Date 09 July 2025
  • First Publish Date 09 July 2025
  • Publish Date 01 August 2025