A Bound State in the Continuum Supported by a Trimeric Metallic Metasurface
A bound state in the continuum (BIC) is a localized state in a continuous spectrum of radiating waves. In this study, the coupled-mode theory is introduced to more precisely interpret a symmetry-protected BIC and the quasi-BIC in a facile trimeric metasurface, compared with Fano formula, which is in...
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| Format: | Article |
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MDPI AG
2022-12-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/1/40 |
| _version_ | 1827622532056875008 |
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| author | Tao Fu Ziyan Wang Yonghe Chen |
| author_facet | Tao Fu Ziyan Wang Yonghe Chen |
| author_sort | Tao Fu |
| collection | DOAJ |
| description | A bound state in the continuum (BIC) is a localized state in a continuous spectrum of radiating waves. In this study, the coupled-mode theory is introduced to more precisely interpret a symmetry-protected BIC and the quasi-BIC in a facile trimeric metasurface, compared with Fano formula, which is introduced to generate a high-quality factor resonance in a trimeric metallic slit metasurface. The multipole decomposition method and the near field distribution of the structure further illustrate that the underlying physics of the high-<i>Q</i> is mainly originated from the interference between the electric quadrupole mode and the magnetic toroidal mode. Physical mechanism shows that the resonance arises from the perturbation of symmetry-protected BICs. The result may play a role in the applications of lasers, optical sensors, and low-loss fibers. |
| first_indexed | 2024-03-09T11:27:03Z |
| format | Article |
| id | doaj.art-eaba5cc55f7a4188ab3daf244f8c2430 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T11:27:03Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-eaba5cc55f7a4188ab3daf244f8c24302023-12-01T00:01:37ZengMDPI AGPhotonics2304-67322022-12-011014010.3390/photonics10010040A Bound State in the Continuum Supported by a Trimeric Metallic MetasurfaceTao Fu0Ziyan Wang1Yonghe Chen2Guangxi Key Laboratory of Precision Navigation Technology and Application, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Precision Navigation Technology and Application, Guilin University of Electronic Technology, Guilin 541004, ChinaGuangxi Key Laboratory of Precision Navigation Technology and Application, Guilin University of Electronic Technology, Guilin 541004, ChinaA bound state in the continuum (BIC) is a localized state in a continuous spectrum of radiating waves. In this study, the coupled-mode theory is introduced to more precisely interpret a symmetry-protected BIC and the quasi-BIC in a facile trimeric metasurface, compared with Fano formula, which is introduced to generate a high-quality factor resonance in a trimeric metallic slit metasurface. The multipole decomposition method and the near field distribution of the structure further illustrate that the underlying physics of the high-<i>Q</i> is mainly originated from the interference between the electric quadrupole mode and the magnetic toroidal mode. Physical mechanism shows that the resonance arises from the perturbation of symmetry-protected BICs. The result may play a role in the applications of lasers, optical sensors, and low-loss fibers.https://www.mdpi.com/2304-6732/10/1/40bound states in the continuummetasurfaceFano’s formulacoupled-mode theoryscattering power |
| spellingShingle | Tao Fu Ziyan Wang Yonghe Chen A Bound State in the Continuum Supported by a Trimeric Metallic Metasurface Photonics bound states in the continuum metasurface Fano’s formula coupled-mode theory scattering power |
| title | A Bound State in the Continuum Supported by a Trimeric Metallic Metasurface |
| title_full | A Bound State in the Continuum Supported by a Trimeric Metallic Metasurface |
| title_fullStr | A Bound State in the Continuum Supported by a Trimeric Metallic Metasurface |
| title_full_unstemmed | A Bound State in the Continuum Supported by a Trimeric Metallic Metasurface |
| title_short | A Bound State in the Continuum Supported by a Trimeric Metallic Metasurface |
| title_sort | bound state in the continuum supported by a trimeric metallic metasurface |
| topic | bound states in the continuum metasurface Fano’s formula coupled-mode theory scattering power |
| url | https://www.mdpi.com/2304-6732/10/1/40 |
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