An analytical method to study the magneto-optical effects of a graphene sheet embedded between two magneto-optical media

Roumi, Bita; Abdi–Ghaleh, Reza

doi:10.1016/j.jmmm.2021.168132

Cited by 5 publications

(1 citation statement)

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“…25,26 Current research on LSPR-enhanced absorption has focused on reciprocal materials, with less research on magneto-optical materials. [27][28][29] Currently, intensive research activities have been devoted to theoretically studying the effect of geometric parameters on the nonreciprocal optical properties of magneto-optical microstructure using the transfer matrix method (TMM) [30][31][32][33][34] and finite-difference time-domain (FDTD). [35][36][37][38] Both methods consider the wave effects in magneto-optical microstructure by solving full-wave vector Maxwell's equations.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal optical properties of magneto-optical film doped with metal particles based on the effective medium theory

2023

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In search of next-generation optical information functional materials, magnetooptical microstructures have attracted great attention since they can break Kirchhoff's law and produce higher photoelectric conversion efficiency. Theoretical studies using finite-difference time-domain and transfer matrix methods have been performed to investigate the optical properties of magneto-optical microstructures. However, these methods are computationally intensive and require periodic conditions, which may not be satisfied with most fabricated samples. The equivalent medium algorithm is improved to make it suitable for the equivalent of magnetooptical materials. Based on the improved equivalent medium theory (EMT), a magneto-optical InSb film structure doped with Au particles (D-InSb) is designed. The effective dielectric functions of the D-InSb layer for transfer matrix waves are obtained from the Bruggeman approximation. Thin-film optics formulas incorporating the anisotropic wave propagation in uniaxial media are employed to calculate the nonreciprocal absorptance of the D-InSb film. The effect of geometric parameters, such as filling ratio and number of layers, is investigated. In addition to modeling the directional radiative properties at various angles of incidence, the hemispherical properties are also calculated to understand the light absorption. The results of our study can provide methods and ideas for the design of solar cells, infrared absorbers, and optical isolators.

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