Enhancement of transverse Kerr effect in a BiYIG based magneto optical device with metal nanopyramid arrays
Abstract The magneto-optical device based on a periodic array of metal nanopyramids embedded in a film of Bi:YIG coated on the surface of a silver substrate, is optimized utilizing a computational simulation technique (CST Microwave Studio). Under coupling conditions through the two-dimensional grat...
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Nature Portfolio
2025-03-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-92984-9 |
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| author | Saeed Afrouzi Vahid Fallahi Reza Aghbolaghi Hamze Ali Navid |
| author_facet | Saeed Afrouzi Vahid Fallahi Reza Aghbolaghi Hamze Ali Navid |
| author_sort | Saeed Afrouzi |
| collection | DOAJ |
| description | Abstract The magneto-optical device based on a periodic array of metal nanopyramids embedded in a film of Bi:YIG coated on the surface of a silver substrate, is optimized utilizing a computational simulation technique (CST Microwave Studio). Under coupling conditions through the two-dimensional grating, the TM-guided modes with narrow resonance are excited in the Bi:YIG film by the incident light, increasing hence the light-matter interaction. Such coupling results as the dips in the reflectance spectrum. The transverse magneto-optical Kerr effect (TMOKE) for a similar structure with a periodic array of rectangular nano-silver is around 4%, hence an enhancement with one order of magnitude was achieved through the proposed device. The surface plasmon polariton modes with the asymmetric narrowband spectral feature are presented in the diffraction of light by a grating in the near-wavelength regime for the TMOKE case, particularly the high reflectivity ( $$\sim 47\%$$ ) and the high-quality factor resonances ( $$Q\sim 332$$ ). Hence, it would be a promising device for magnetic field sensing and even biosensing applications. |
| format | Article |
| id | doaj-art-a5f682b1a9ce4ababe66d69ab9a3b6ed |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-a5f682b1a9ce4ababe66d69ab9a3b6ed2025-08-20T03:02:19ZengNature PortfolioScientific Reports2045-23222025-03-011511810.1038/s41598-025-92984-9Enhancement of transverse Kerr effect in a BiYIG based magneto optical device with metal nanopyramid arraysSaeed Afrouzi0Vahid Fallahi1Reza Aghbolaghi2Hamze Ali Navid3Department of Laser and Optical Engineering, University of BonabDepartment of Laser and Optical Engineering, University of BonabDepartment of Laser and Optical Engineering, University of BonabDepartment of Laser and Optical Engineering, University of BonabAbstract The magneto-optical device based on a periodic array of metal nanopyramids embedded in a film of Bi:YIG coated on the surface of a silver substrate, is optimized utilizing a computational simulation technique (CST Microwave Studio). Under coupling conditions through the two-dimensional grating, the TM-guided modes with narrow resonance are excited in the Bi:YIG film by the incident light, increasing hence the light-matter interaction. Such coupling results as the dips in the reflectance spectrum. The transverse magneto-optical Kerr effect (TMOKE) for a similar structure with a periodic array of rectangular nano-silver is around 4%, hence an enhancement with one order of magnitude was achieved through the proposed device. The surface plasmon polariton modes with the asymmetric narrowband spectral feature are presented in the diffraction of light by a grating in the near-wavelength regime for the TMOKE case, particularly the high reflectivity ( $$\sim 47\%$$ ) and the high-quality factor resonances ( $$Q\sim 332$$ ). Hence, it would be a promising device for magnetic field sensing and even biosensing applications.https://doi.org/10.1038/s41598-025-92984-9Magneto opticsKerr effectSurface plasmon polaritonTwo dimensional gratingDiffractionNanopyramids array |
| spellingShingle | Saeed Afrouzi Vahid Fallahi Reza Aghbolaghi Hamze Ali Navid Enhancement of transverse Kerr effect in a BiYIG based magneto optical device with metal nanopyramid arrays Scientific Reports Magneto optics Kerr effect Surface plasmon polariton Two dimensional grating Diffraction Nanopyramids array |
| title | Enhancement of transverse Kerr effect in a BiYIG based magneto optical device with metal nanopyramid arrays |
| title_full | Enhancement of transverse Kerr effect in a BiYIG based magneto optical device with metal nanopyramid arrays |
| title_fullStr | Enhancement of transverse Kerr effect in a BiYIG based magneto optical device with metal nanopyramid arrays |
| title_full_unstemmed | Enhancement of transverse Kerr effect in a BiYIG based magneto optical device with metal nanopyramid arrays |
| title_short | Enhancement of transverse Kerr effect in a BiYIG based magneto optical device with metal nanopyramid arrays |
| title_sort | enhancement of transverse kerr effect in a biyig based magneto optical device with metal nanopyramid arrays |
| topic | Magneto optics Kerr effect Surface plasmon polariton Two dimensional grating Diffraction Nanopyramids array |
| url | https://doi.org/10.1038/s41598-025-92984-9 |
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