Fano Resonances in Metal Gratings with Sub-Wavelength Slits on High Refractive Index Silicon
The enhancement of optical waves through perforated plates has received particular attention over the past two decades. This phenomenon can occur due to two distinct and independent mechanisms, namely, nanoscale enhanced optical transmission and micron-scale Fabry–Perot resonance. The aim of the pre...
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2023-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/21/6982 |
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| author | Abdelhaq Belkacem Hammou Oubeniz Hicham Mangach Muamer Kadic Noureddine Cherkaoui Eddeqaqi Abdenbi Bouzid Younes Achaoui |
| author_facet | Abdelhaq Belkacem Hammou Oubeniz Hicham Mangach Muamer Kadic Noureddine Cherkaoui Eddeqaqi Abdenbi Bouzid Younes Achaoui |
| author_sort | Abdelhaq Belkacem |
| collection | DOAJ |
| description | The enhancement of optical waves through perforated plates has received particular attention over the past two decades. This phenomenon can occur due to two distinct and independent mechanisms, namely, nanoscale enhanced optical transmission and micron-scale Fabry–Perot resonance. The aim of the present paper is to shed light on the coupling potential between two neighboring slots filled with two different materials with contrasting physical properties (air and silicon, for example). Using theoretical predictions and numerical simulations, we highlight the role of each constituent material; the low-index material (air) acts as a continuum, while the higher-index material (silicon) exhibits discrete states. This combination gives rise to the so-called Fano resonance, well known since the early 1960s. In particular, it has been demonstrated that optimized geometrical parameters can create sustainable and robust band gaps at will, which provides the scientific community with a further genuine alternative to control optical waves. |
| first_indexed | 2024-03-11T11:26:55Z |
| format | Article |
| id | doaj.art-f771e63d521a421bb58053b6b63c9290 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T11:26:55Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-f771e63d521a421bb58053b6b63c92902023-11-10T15:07:31ZengMDPI AGMaterials1996-19442023-10-011621698210.3390/ma16216982Fano Resonances in Metal Gratings with Sub-Wavelength Slits on High Refractive Index SiliconAbdelhaq Belkacem0Hammou Oubeniz1Hicham Mangach2Muamer Kadic3Noureddine Cherkaoui Eddeqaqi4Abdenbi Bouzid5Younes Achaoui6Laboratory of Optics, Information Processing, Mechanics, Energetics and Electronics, Department of Physics, Moulay Ismail University, Zitoune, Meknes B.P.11201, MoroccoLaboratory of Optics, Information Processing, Mechanics, Energetics and Electronics, Department of Physics, Moulay Ismail University, Zitoune, Meknes B.P.11201, MoroccoLight, Nanomaterials Nanotechnologies (L2n), CNRS-ERL7004, Université de Technologie de Troyes, 10000 Troyes, FranceInstitut FEMTO-ST, UMR6174, CNRS, Université de Bourgogne Franche-Comté, 25000 Besançon, FranceLaboratory of Optics, Information Processing, Mechanics, Energetics and Electronics, Department of Physics, Moulay Ismail University, Zitoune, Meknes B.P.11201, MoroccoLaboratory of Optics, Information Processing, Mechanics, Energetics and Electronics, Department of Physics, Moulay Ismail University, Zitoune, Meknes B.P.11201, MoroccoLaboratory of Optics, Information Processing, Mechanics, Energetics and Electronics, Department of Physics, Moulay Ismail University, Zitoune, Meknes B.P.11201, MoroccoThe enhancement of optical waves through perforated plates has received particular attention over the past two decades. This phenomenon can occur due to two distinct and independent mechanisms, namely, nanoscale enhanced optical transmission and micron-scale Fabry–Perot resonance. The aim of the present paper is to shed light on the coupling potential between two neighboring slots filled with two different materials with contrasting physical properties (air and silicon, for example). Using theoretical predictions and numerical simulations, we highlight the role of each constituent material; the low-index material (air) acts as a continuum, while the higher-index material (silicon) exhibits discrete states. This combination gives rise to the so-called Fano resonance, well known since the early 1960s. In particular, it has been demonstrated that optimized geometrical parameters can create sustainable and robust band gaps at will, which provides the scientific community with a further genuine alternative to control optical waves.https://www.mdpi.com/1996-1944/16/21/6982discrete statecontinuum stateFano resonancesurface plasmonFEM methodRCWA method |
| spellingShingle | Abdelhaq Belkacem Hammou Oubeniz Hicham Mangach Muamer Kadic Noureddine Cherkaoui Eddeqaqi Abdenbi Bouzid Younes Achaoui Fano Resonances in Metal Gratings with Sub-Wavelength Slits on High Refractive Index Silicon Materials discrete state continuum state Fano resonance surface plasmon FEM method RCWA method |
| title | Fano Resonances in Metal Gratings with Sub-Wavelength Slits on High Refractive Index Silicon |
| title_full | Fano Resonances in Metal Gratings with Sub-Wavelength Slits on High Refractive Index Silicon |
| title_fullStr | Fano Resonances in Metal Gratings with Sub-Wavelength Slits on High Refractive Index Silicon |
| title_full_unstemmed | Fano Resonances in Metal Gratings with Sub-Wavelength Slits on High Refractive Index Silicon |
| title_short | Fano Resonances in Metal Gratings with Sub-Wavelength Slits on High Refractive Index Silicon |
| title_sort | fano resonances in metal gratings with sub wavelength slits on high refractive index silicon |
| topic | discrete state continuum state Fano resonance surface plasmon FEM method RCWA method |
| url | https://www.mdpi.com/1996-1944/16/21/6982 |
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