Stimulated Brillouin scattering in micro/nanophotonic waveguides and resonators

Abstract

With the ongoing advancement of micro- and nanofabrication techniques, there has been a notable revival of interest in the field of stimulated Brillouin scattering within micro- and nanoscale waveguide structures in recent years. A variety of micro- and nanophotonic devices with different functions have been designed and fabricated, including lasers, amplifiers, isolators, sensors, filters, delay lines, and memory devices. Here, we provide a comprehensive review of stimulated Brillouin scattering in micro/nanophotonic waveguides and resonators on various promising material platforms, covering several key aspects such as the generation mechanisms of Brillouin nonlinear interactions in different waveguide structures and material platforms, methods for enhancing Brillouin gain, and a range of typical applications. Concluding our review, we offer insights into prospective future directions for this field.