Faraday rotation effect in a one-dimensional photonic crystal containing the weyl semimetal Co3Sn2S2

In this paper, we propose to use the Weyl semimetal- Co3Sn2S2 embedded between two Bragg reflectors to attain the Faraday rotation without an external magnetic field in the mid-infrared region. Our results show a high optical transmittance peak of 60 % and a corresponding Faraday rotation angle of approximately - 31.34 degrees over the wavelength spectrum 7000-8000 nm with no ellipticity. The increased Faraday rotation angle originated through the localization of the light inside the defect layer. We also explore how ambient temperature affects the transmission light intensity and the Faraday rotation angle, revealing that both can be modulated by the temperature-dependent conductivity of the Weyl semimetal. Furthermore, the impact of varying Co3Sn2S2 thicknesses and number of layers on transmission intensity response and the corresponding Faraday rotation is investigated.