Non-reciprocal characteristics of dual defect modes in a one-dimensional photonic crystal based on Weyl semimetal

Ibtihaj Ahmed Kadhim and Samad Roshan Entezar

Journal of Electromagnetic Waves and Applications, 2024, vol. 38, issue 12, 1360-1374

Abstract: The non-reciprocal behavior of defect modes of a one-dimensional photonic crystal with two Weyl-semimetal-based defects is investigate by applying the transfer matrix method. The transmission spectrum of the structure exhibits two distinct defect modes. The study shows that these defect modes can be adjusted by altering the thickness of the Weyl semimetal layers and the modulus of the axial vector $ \vec{b} $ b→ for both forward- and backward-impinging cases. The peak transmission and frequency of the defect modes are found to be dependent on the thickness of the Weyl semimetal layers, the magnitude of the axial vector $ \vec{b} $ b→, and the impinging direction of the incoming beam. Additionally, the quality factor of the defect modes changes with the thickness of the Weyl semimetal layers and the magnitude of the axial vector $ \vec{b} $ b→ but is largely unaffected by reversing the impinging direction of the incoming beam.

Date: 2024
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DOI: 10.1080/09205071.2024.2372324

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