Conservation law of angular momentum in helicity-dependent Raman and Rayleigh scattering

Yuki Tatsumi, Tomoaki Kaneko, Riichiro Saito

研究成果: Article査読

4 被引用数 (Scopus)

抄録

In first-order Raman scattering, helicity of circularly polarized incident light is either conserved or changed depending on the Raman modes. When the helicity of incident light changes in the scattered light, the angular momentum of a photon is transferred to the material. Here, we present the conservation law of pseudoangular momentum in the helicity-dependent Raman scattering for a N-fold (N=1-4,6) rotational symmetry of a crystal. Furthermore, the conservation law of electron-phonon interaction is discussed by considering the vibration direction of a phonon that has the same or lower symmetry than the symmetry of the crystal, which is essential to allow the helicity change in Raman scattering in a highly symmetric material, such as graphene. We also discuss the conservation law of pseudoangular momentum in Rayleigh scattering and show that the helicity change is allowed only in the crystal with one- or twofold rotational symmetry.

本文言語English
論文番号195444
ジャーナルPhysical Review B
97
19
DOI
出版ステータスPublished - 2018 5 29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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