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. 2019 Jul 24;10:3297. doi: 10.1038/s41467-019-11175-z

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Nonreciprocal stimulated Raman scattering. a Energy diagram for Raman decay of a pump photon into a Stokes photon and a phonon. b Nonreciprocal polarization rotation due to Faraday effect in magnetized medium. c, d Phonons that produce spin-polarized nonreciprocal SRS for CPL propagating in z. Mulliken symbols and x–y Raman tensors are provided for c silicon, and d blue phosphorene. e One-way amplification due to stimulated Raman scattering in silicon pumped with circularly polarized light