Nonreciprocity in Brillouin scattering

Nils T. Otterstrom, Eric A. Kittlaus, Donggyu B. Sohn, Gaurav Bahl

Research output: Chapter in Book/Report/Conference proceedingChapter


Nonreciprocal devices are essential in nearly all complex optical systems as they play a major role for laser protection and directional signal routing. While the common implementation of these devices is with magneto-optic materials, the approach is not yet suitable for on-chip integration at scale, or for applications that are sensitive to magnetic fields. Notably, the phase-matching relations intrinsic to Brillouin scattering offer an effective solution to producing these devices in nearly any optically transparent material system. In this chapter we discuss how Brillouin scattering-based nonreciprocity can be utilized in the spontaneous scattering, stimulated scattering, and induced transparency regimes, and we show how these nonreciprocal effects offer a path to producing idealized nonreciprocal behavior. We also perform a review of the wide range of nonreciprocal platforms that have been demonstrated to date, spanning dielectric-based fibers and resonators, to on-chip silicon and silicon nitride photonics, to piezoelectric photonic devices.

Original languageEnglish (US)
Title of host publicationBrillouin Scattering Part 2
EditorsBenjamin J. Eggleton, Michael J. Steel, Christopher G. Poulton
PublisherAcademic Press Inc.
Number of pages32
ISBN (Print)9780323989312
StatePublished - Jan 2022

Publication series

NameSemiconductors and Semimetals
ISSN (Print)0080-8784


  • Brillouin scattering
  • Circulators
  • Induced transparency
  • Integrated photonics
  • Interband scattering
  • Intermodal scattering
  • Isolators
  • Nonreciprocity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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