Tunable broadband transmittance and Faraday effect in a magnetophotonic nanostructure with gradient thickness

We propose a magnetic photonic crystal (MPC) nanostruc-ture with a gradient thickness of the magnetic layer. Such a nanostructure exhibits on-the-fly adjustment of optical and magneto-optical (MO) properties. Spatial displacement of the input beam allows tuning of the spectral position of the defect mode resonance in the bandgap of both transmis-sion and magneto-optical spectra. Meanwhile, by varying the diameter of the input beam or its focus one can control the resonance width in both optical and magneto-optical spectra.(c) 2022 Optica Publishing Group

Automated summary

In this study, a magnetic photonic crystal (MPC) nanostructure with a gradient thickness of the magnetic layer is proposed, which allows on-the-fly adjustment of optical and magneto-optical properties. The spectral position of the defect mode resonance in the bandgap of transmission and magneto-optical spectra can be tuned by spatial displacement of the input beam, while the resonance width in both optical and magneto-optical spectra can be controlled by varying the diameter of the input beam or its focus.