Open AccessФеноменологическая модель нелинейных оптических свойств топологической среды
Author(s) -
A. I. Maĭmistov
Publication year - 2021
Publication title -
optika i spektroskopiâ
Language(s) - English
Resource type - Journals
eISSN - 2782-6694
pISSN - 0030-4034
DOI - 10.21883/os.2021.01.50443.231-20
Subject(s) - physics , polarization (electrochemistry) , curvature , nonlinear system , berry connection and curvature , optics , quantum mechanics , mathematics , geometry , chemistry , quantum
Based on the quasi-classical description of electron dynamics in topological media, the gyrotropic prop-erties of which are due to the non-zero Berry curvature, the phenomenological model is proposed. Model allows us to consider some nonlinear optical processes – the generation of the third harmonic and the rotation of the wave polarization vector depending on the intensity. Third-order nonlinear sus-ceptibilities, which determine the interaction of waves taking into account the rotation of the wave po-larization vector, are determined. Gyrotropicity manifests itself in the dependence of the harmonic con-version efficiency on the circular polarization of radiation, which can be used to measure the parameters of this media.