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arXiv · 2311.18135

Cross-Polarized Stimulated Brillouin Scattering in Lithium Niobate Waveguides

Caique C. Rodrigues·Nick J. Schilder·Roberto O. Zurita·Letícia S. Magalhães·Amirhassan Shams-Ansari·Felipe J. L. dos Santos·Otávio M. Paiano·Thiago P. M. Alegre·Marko Lončar·Gustavo S. Wiederhecker
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Abstract

We report on the experimental demonstration of cross-polarization backward stimulated Brillouin scattering (BSBS) in lithium niobate on insulator (LNOI) waveguides. Performing polarization-sensitive pump and probe measurements, we captured both intra- and intermodal scattering between counterpropagating fundamental optical modes. Remarkably, cross-polarization scattering achieved SBS gains that exceeded $G_{B}=$80m$^{-1}$W$^{-1}$. This substantial gain not only broadens the utility of polarization in SBS but also paves the way for high-performance devices, including ultranarrowband lasers, robust broadband nonreciprocal devices, RF filters, and microwave-to-optical converters.

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Caique C. Rodrigues, Nick J. Schilder, Roberto O. Zurita, Letícia S. Magalhães, Amirhassan Shams-Ansari, Felipe J. L. dos Santos, Otávio M. Paiano, Thiago P. M. Alegre, Marko Lončar, Gustavo S. Wiederhecker. 2023-11-29. Cross-Polarized Stimulated Brillouin Scattering in Lithium Niobate Waveguides. https://doi.org/10.1103/physrevlett.134.113601

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