Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions
Abstract We numerically investigated the effects of meta-atom interactions on the Fano resonance in all-dielectric metasurfaces by introducing alternately flipped asymmetric paired bars (APBs) and split asymmetric paired bars (SAPBs). With alternately flipped configurations, the Q-factor of the Fano...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2017-08-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-07715-6 |
| _version_ | 1818425283857874944 |
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| author | Guanghou Sun Lierong Yuan Yi Zhang Xuejin Zhang Yongyuan Zhu |
| author_facet | Guanghou Sun Lierong Yuan Yi Zhang Xuejin Zhang Yongyuan Zhu |
| author_sort | Guanghou Sun |
| collection | DOAJ |
| description | Abstract We numerically investigated the effects of meta-atom interactions on the Fano resonance in all-dielectric metasurfaces by introducing alternately flipped asymmetric paired bars (APBs) and split asymmetric paired bars (SAPBs). With alternately flipped configurations, the Q-factor of the Fano resonance is significantly enhanced up to one order of magnitude, and the electric field is strengthened by more than twice. Abnormally, the Q-factor increases with gap size in the alternately flipped SAPBs. These are attributed to the destructive interaction among nearest-neighbor dipole resonators. The Q-factor of 108 and Raman enhancement factor of 109 in the gap can be realized with the alternately flipped SAPBs made of Si. Our study provides a way to improve performance of practical devices such as ultrasensitive sensors, nonlinear optics, and quantum emitters. |
| first_indexed | 2024-12-14T14:11:29Z |
| format | Article |
| id | doaj.art-d225cef97da441caa6bef751d5373bb6 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-14T14:11:29Z |
| publishDate | 2017-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-d225cef97da441caa6bef751d5373bb62022-12-21T22:58:18ZengNature PortfolioScientific Reports2045-23222017-08-01711710.1038/s41598-017-07715-6Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactionsGuanghou Sun0Lierong Yuan1Yi Zhang2Xuejin Zhang3Yongyuan Zhu4National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures and Key Laboratory of Modern Acoustics and School of Physics, Nanjing UniversityNational Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures and Key Laboratory of Modern Acoustics and School of Physics, Nanjing UniversityNational Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures and Key Laboratory of Modern Acoustics and School of Physics, Nanjing UniversityNational Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures and Key Laboratory of Modern Acoustics and School of Physics, Nanjing UniversityNational Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures and Key Laboratory of Modern Acoustics and School of Physics, Nanjing UniversityAbstract We numerically investigated the effects of meta-atom interactions on the Fano resonance in all-dielectric metasurfaces by introducing alternately flipped asymmetric paired bars (APBs) and split asymmetric paired bars (SAPBs). With alternately flipped configurations, the Q-factor of the Fano resonance is significantly enhanced up to one order of magnitude, and the electric field is strengthened by more than twice. Abnormally, the Q-factor increases with gap size in the alternately flipped SAPBs. These are attributed to the destructive interaction among nearest-neighbor dipole resonators. The Q-factor of 108 and Raman enhancement factor of 109 in the gap can be realized with the alternately flipped SAPBs made of Si. Our study provides a way to improve performance of practical devices such as ultrasensitive sensors, nonlinear optics, and quantum emitters.https://doi.org/10.1038/s41598-017-07715-6 |
| spellingShingle | Guanghou Sun Lierong Yuan Yi Zhang Xuejin Zhang Yongyuan Zhu Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions Scientific Reports |
| title | Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions |
| title_full | Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions |
| title_fullStr | Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions |
| title_full_unstemmed | Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions |
| title_short | Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions |
| title_sort | q factor enhancement of fano resonance in all dielectric metasurfaces by modulating meta atom interactions |
| url | https://doi.org/10.1038/s41598-017-07715-6 |
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