Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday Rotation
We demonstrate magnetic control of optical reflectance with no ferromagnetic material via combining the Faraday rotation and the surface plasmon resonance (SPR) in a Kretschman configuration under magnetic fields < 0.5 T. The SPR produces the polarization sensitive reflectance from the Au or Ag t...
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MDPI AG
2021-06-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/12/3354 |
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| author | Changjin Son Heongkyu Ju |
| author_facet | Changjin Son Heongkyu Ju |
| author_sort | Changjin Son |
| collection | DOAJ |
| description | We demonstrate magnetic control of optical reflectance with no ferromagnetic material via combining the Faraday rotation and the surface plasmon resonance (SPR) in a Kretschman configuration under magnetic fields < 0.5 T. The SPR produces the polarization sensitive reflectance from the Au or Ag thin film coated on a N-BK7 prism in which the Faraday rotation occurs. The gold (Au) or silver (Ag) metal film as a plasmonic film somewhat acts as an incident angle-dependent reflection polarizer that can sensitively sense the polarization change induced by the Faraday rotation that occurs in a prism. We find that combination of Faraday rotation and the surface plasmon can induce a significant magnetic modulation of reflectance normalized with respect to that obtained with no magnetic fields at a specific incident angle of light. The magnetic control of optical reflectance presented may find an application in polarizer-free photonic devices with no ferromagnetic material for magneto-optical modulation. |
| first_indexed | 2024-03-10T10:19:27Z |
| format | Article |
| id | doaj.art-550167e340434e0f8d2bb125429a09f6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T10:19:27Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-550167e340434e0f8d2bb125429a09f62023-11-22T00:31:53ZengMDPI AGMaterials1996-19442021-06-011412335410.3390/ma14123354Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday RotationChangjin Son0Heongkyu Ju1Department of Physics, Gachon University, Seongnam-si 13120, Gyeonggi-do, KoreaDepartment of Physics, Gachon University, Seongnam-si 13120, Gyeonggi-do, KoreaWe demonstrate magnetic control of optical reflectance with no ferromagnetic material via combining the Faraday rotation and the surface plasmon resonance (SPR) in a Kretschman configuration under magnetic fields < 0.5 T. The SPR produces the polarization sensitive reflectance from the Au or Ag thin film coated on a N-BK7 prism in which the Faraday rotation occurs. The gold (Au) or silver (Ag) metal film as a plasmonic film somewhat acts as an incident angle-dependent reflection polarizer that can sensitively sense the polarization change induced by the Faraday rotation that occurs in a prism. We find that combination of Faraday rotation and the surface plasmon can induce a significant magnetic modulation of reflectance normalized with respect to that obtained with no magnetic fields at a specific incident angle of light. The magnetic control of optical reflectance presented may find an application in polarizer-free photonic devices with no ferromagnetic material for magneto-optical modulation.https://www.mdpi.com/1996-1944/14/12/3354noble metal filmsurface plasmon resonanceFaraday rotationmagnetic modulationmagnetic anisotropyoptical reflectance |
| spellingShingle | Changjin Son Heongkyu Ju Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday Rotation Materials noble metal film surface plasmon resonance Faraday rotation magnetic modulation magnetic anisotropy optical reflectance |
| title | Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday Rotation |
| title_full | Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday Rotation |
| title_fullStr | Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday Rotation |
| title_full_unstemmed | Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday Rotation |
| title_short | Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday Rotation |
| title_sort | magnetic control of optical reflectance from metallic thin film using surface plasmon resonance and faraday rotation |
| topic | noble metal film surface plasmon resonance Faraday rotation magnetic modulation magnetic anisotropy optical reflectance |
| url | https://www.mdpi.com/1996-1944/14/12/3354 |
| work_keys_str_mv | AT changjinson magneticcontrolofopticalreflectancefrommetallicthinfilmusingsurfaceplasmonresonanceandfaradayrotation AT heongkyuju magneticcontrolofopticalreflectancefrommetallicthinfilmusingsurfaceplasmonresonanceandfaradayrotation |