期刊
JOURNAL OF OPTICS
卷 18, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/18/5/055607
关键词
slab waveguide; anisotropic; magnetoelectric effect; chiral; topological; hybrid mode; complex mode
类别
Optical modes in anisotropic slab waveguides with topological and chiral magnetoelectric effects are investigated analytically, by deriving the closed-form characteristic equations of the modes and hence computing the dispersion-diagrams. In order to compute the characteristic equations, a vector-potential approach is introduced by incorporating a generalized Lorentz gauge, and the Helmholtz equations are derived correspondingly. It will be shown that the formation of the complex modes and hybridization of the optical modes in such slab waveguides is inevitable. Moreover, when the tensorial form of the permittivity in the waveguide allows for a hyperbolic dispersion, complex transition from the photonic kinds of modes to the plasmonic modes is expected.
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