Tailoring Transverse Magneto-Optical Kerr Effect Enhancement in Mie-resonant Nanowire-based Metasurfaces

Abstract

Enhancement and tailoring of the transverse magneto-optical Kerr effect (TMOKE) in hybrid metasurfaces comprising rectangular silicon nanowires coupled with a nickel substrate are demonstrated. The excitation of Mie modes of different orders in nanowires causes the enhancement. The in-plane magnetic dipole mode leads to the largest TMOKE enhancement compared to other Mie modes. Changing the width of silicon nanowires leads to a modification of that mode, thereby ensuring the tailoring of the TMOKE within the range of $2.2\%-3.8\%$. This tunability is associated with the modification of the near-field localized at the Si/Ni interface and the far-field response of the excited magnetic dipole mode. Adjusting these two quantities allows one to achieve the highest values of the TMOKE caused by individual Mie modes in silicon nanowires.

arXiv comment8 pages, 5 figures

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Cited by in corpus (1)

• Spin-wave hybridization in bismuth iron garnet Mie spheres induced by the inverse Faraday effect