Observation of edge bound states in the continuum at truncated silicon pillar photonic crystal
Abstract Bound states in the continuum are optical modes with extremely high-quality factors and narrow resonances, which exist in the dispersion spectrum of the radiative region above the light line. A unique bound state in the continuum is supported at the edge of truncated photonic crystals, whic...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-12-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-54929-0 |
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| author | Rodrigo Sato Christian Vinther Bertelsen Maxim Nikitin Elena Lopez Aymerich Radu Malureanu Winnie Edith Svendsen Andrei V. Lavrinenko Osamu Takayama |
| author_facet | Rodrigo Sato Christian Vinther Bertelsen Maxim Nikitin Elena Lopez Aymerich Radu Malureanu Winnie Edith Svendsen Andrei V. Lavrinenko Osamu Takayama |
| author_sort | Rodrigo Sato |
| collection | DOAJ |
| description | Abstract Bound states in the continuum are optical modes with extremely high-quality factors and narrow resonances, which exist in the dispersion spectrum of the radiative region above the light line. A unique bound state in the continuum is supported at the edge of truncated photonic crystals, which is a type of a Fabry-Pérot type bound state in the continuum, but has never been observed in experiments. Here, we demonstrate the bound states in the continuum supported at the edge array of silicon (Si) pillars whose diameter is bigger than that of the rest of a Si-pillar two-dimensional photonic crystal. We also show the tunability of the resonance and surface sensitivity of the mode when Si pillars are conformally coated with nanometer-thick aluminium oxide films. The presence of an oxide nanofilm improves the quality factor by over 60 % and shifts the resonance wavelength. Such behavior signifies the substantial potential of the bound states in the continuum on two-dimensional photonic crystals for post-fabrication tuning of the quality factor and surface sensing applications. |
| format | Article |
| id | doaj-art-c94898845e8f405f99e4d4e27c439365 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-c94898845e8f405f99e4d4e27c4393652024-12-08T12:36:35ZengNature PortfolioNature Communications2041-17232024-12-011511810.1038/s41467-024-54929-0Observation of edge bound states in the continuum at truncated silicon pillar photonic crystalRodrigo Sato0Christian Vinther Bertelsen1Maxim Nikitin2Elena Lopez Aymerich3Radu Malureanu4Winnie Edith Svendsen5Andrei V. Lavrinenko6Osamu Takayama7DTU Electro, Technical University of DenmarkDTU Bioengineering – Department of Biotechnology and Biomedicine, Technical University of DenmarkDTU Electro, Technical University of DenmarkDTU Nanolab - National Centre for Nano Fabrication and Characterization, Technical University of DenmarkDTU Electro, Technical University of DenmarkDTU Bioengineering – Department of Biotechnology and Biomedicine, Technical University of DenmarkDTU Electro, Technical University of DenmarkDTU Electro, Technical University of DenmarkAbstract Bound states in the continuum are optical modes with extremely high-quality factors and narrow resonances, which exist in the dispersion spectrum of the radiative region above the light line. A unique bound state in the continuum is supported at the edge of truncated photonic crystals, which is a type of a Fabry-Pérot type bound state in the continuum, but has never been observed in experiments. Here, we demonstrate the bound states in the continuum supported at the edge array of silicon (Si) pillars whose diameter is bigger than that of the rest of a Si-pillar two-dimensional photonic crystal. We also show the tunability of the resonance and surface sensitivity of the mode when Si pillars are conformally coated with nanometer-thick aluminium oxide films. The presence of an oxide nanofilm improves the quality factor by over 60 % and shifts the resonance wavelength. Such behavior signifies the substantial potential of the bound states in the continuum on two-dimensional photonic crystals for post-fabrication tuning of the quality factor and surface sensing applications.https://doi.org/10.1038/s41467-024-54929-0 |
| spellingShingle | Rodrigo Sato Christian Vinther Bertelsen Maxim Nikitin Elena Lopez Aymerich Radu Malureanu Winnie Edith Svendsen Andrei V. Lavrinenko Osamu Takayama Observation of edge bound states in the continuum at truncated silicon pillar photonic crystal Nature Communications |
| title | Observation of edge bound states in the continuum at truncated silicon pillar photonic crystal |
| title_full | Observation of edge bound states in the continuum at truncated silicon pillar photonic crystal |
| title_fullStr | Observation of edge bound states in the continuum at truncated silicon pillar photonic crystal |
| title_full_unstemmed | Observation of edge bound states in the continuum at truncated silicon pillar photonic crystal |
| title_short | Observation of edge bound states in the continuum at truncated silicon pillar photonic crystal |
| title_sort | observation of edge bound states in the continuum at truncated silicon pillar photonic crystal |
| url | https://doi.org/10.1038/s41467-024-54929-0 |
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