Dual-band bound states in the continuum based on hybridization of surface lattice resonances
We propose and experimentally demonstrate a novel strategy to achieve dual-band symmetry-protected bound states in the continuum (BICs) in silicon metasurfaces. This strategy is based on the hybridization of Mie surface lattice resonances (SLRs) in periodic silicon bipartite nanodisk arrays, of whic...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2022-11-01
|
| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2022-0427 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850063753344712704 |
|---|---|
| author | Du Xiang Xiong Lei Zhao Xueqian Chen Shuai Shi Jianping Li Guangyuan |
| author_facet | Du Xiang Xiong Lei Zhao Xueqian Chen Shuai Shi Jianping Li Guangyuan |
| author_sort | Du Xiang |
| collection | DOAJ |
| description | We propose and experimentally demonstrate a novel strategy to achieve dual-band symmetry-protected bound states in the continuum (BICs) in silicon metasurfaces. This strategy is based on the hybridization of Mie surface lattice resonances (SLRs) in periodic silicon bipartite nanodisk arrays, of which the central nanodisk displaced from the center of the unit cell. We show that dual-band electric quadrupole and magnetic dipole BICs can be supported in such a system, and transfer to quasi-BICs with ultrahigh measured quality factors up to 1240 at the Γ point. Taking advantage of the SLR characteristics, we show that the spectral separation and the quality factors of these two quasi-BICs can be conveniently tuned by varying the nanodisk diameter or the lattice period. Making use of these dual-band quasi-BICs, we numerically obtain bulk sensitivities above 480 nm/RIU and high figures of merit up to 1200. We also show that when the central nanodisk is not displaced but has different diameter, the silicon bipartite nanodisk array supports an electric dipole BIC that was referred to as subradiant SLR in the literature. Our work provides a new approach for realizing and tuning dual-band BICs, and the obtained ultrahigh-Q quasi-BICs can find potential applications in nonlinear optics, multimodal lasing, and optical sensing. |
| format | Article |
| id | doaj-art-bcf83589084544f8bc3c4aefb24b757c |
| institution | DOAJ |
| issn | 2192-8614 |
| language | English |
| publishDate | 2022-11-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-bcf83589084544f8bc3c4aefb24b757c2025-08-20T02:49:30ZengDe GruyterNanophotonics2192-86142022-11-0111214843485310.1515/nanoph-2022-0427Dual-band bound states in the continuum based on hybridization of surface lattice resonancesDu Xiang0Xiong Lei1Zhao Xueqian2Chen Shuai3Shi Jianping4Li Guangyuan5College of Physics and Electronic Information, Anhui Normal University, Wuhu241000, ChinaCAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, ChinaCAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, ChinaTianjin H-Chip Technology Group Corporation, Tianjin300467, Chinashuai.chen_eo@outlook.comCollege of Physics and Electronic Information, Anhui Normal University, Wuhu241000, ChinaCAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, ChinaWe propose and experimentally demonstrate a novel strategy to achieve dual-band symmetry-protected bound states in the continuum (BICs) in silicon metasurfaces. This strategy is based on the hybridization of Mie surface lattice resonances (SLRs) in periodic silicon bipartite nanodisk arrays, of which the central nanodisk displaced from the center of the unit cell. We show that dual-band electric quadrupole and magnetic dipole BICs can be supported in such a system, and transfer to quasi-BICs with ultrahigh measured quality factors up to 1240 at the Γ point. Taking advantage of the SLR characteristics, we show that the spectral separation and the quality factors of these two quasi-BICs can be conveniently tuned by varying the nanodisk diameter or the lattice period. Making use of these dual-band quasi-BICs, we numerically obtain bulk sensitivities above 480 nm/RIU and high figures of merit up to 1200. We also show that when the central nanodisk is not displaced but has different diameter, the silicon bipartite nanodisk array supports an electric dipole BIC that was referred to as subradiant SLR in the literature. Our work provides a new approach for realizing and tuning dual-band BICs, and the obtained ultrahigh-Q quasi-BICs can find potential applications in nonlinear optics, multimodal lasing, and optical sensing.https://doi.org/10.1515/nanoph-2022-0427bound state in the continuummie surface lattice resonancesmultipolessilicon metasurfacesymmetry-protected |
| spellingShingle | Du Xiang Xiong Lei Zhao Xueqian Chen Shuai Shi Jianping Li Guangyuan Dual-band bound states in the continuum based on hybridization of surface lattice resonances Nanophotonics bound state in the continuum mie surface lattice resonances multipoles silicon metasurface symmetry-protected |
| title | Dual-band bound states in the continuum based on hybridization of surface lattice resonances |
| title_full | Dual-band bound states in the continuum based on hybridization of surface lattice resonances |
| title_fullStr | Dual-band bound states in the continuum based on hybridization of surface lattice resonances |
| title_full_unstemmed | Dual-band bound states in the continuum based on hybridization of surface lattice resonances |
| title_short | Dual-band bound states in the continuum based on hybridization of surface lattice resonances |
| title_sort | dual band bound states in the continuum based on hybridization of surface lattice resonances |
| topic | bound state in the continuum mie surface lattice resonances multipoles silicon metasurface symmetry-protected |
| url | https://doi.org/10.1515/nanoph-2022-0427 |
| work_keys_str_mv | AT duxiang dualbandboundstatesinthecontinuumbasedonhybridizationofsurfacelatticeresonances AT xionglei dualbandboundstatesinthecontinuumbasedonhybridizationofsurfacelatticeresonances AT zhaoxueqian dualbandboundstatesinthecontinuumbasedonhybridizationofsurfacelatticeresonances AT chenshuai dualbandboundstatesinthecontinuumbasedonhybridizationofsurfacelatticeresonances AT shijianping dualbandboundstatesinthecontinuumbasedonhybridizationofsurfacelatticeresonances AT liguangyuan dualbandboundstatesinthecontinuumbasedonhybridizationofsurfacelatticeresonances |