Active formation of Friedrich-Wintgen bound states in the continuum in dielectric dimerized grating borophene heterostructure
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866917570606530560 |
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| author | Yan, Xiao-Fei Wang, Xin-Yang Lin, Qi Wang, Ling-Ling Liu, Gui-Dong |
| author_facet | Yan, Xiao-Fei Wang, Xin-Yang Lin, Qi Wang, Ling-Ling Liu, Gui-Dong |
| contents | The Friedrich-Wintgen bound state in the continuum (FW BIC) provides a unique approach for achieving high quality factor (Q-factor) resonance, which has attracted wide attention and promoted the development of various applications. However, the FW BIC is usually considered as accident BIC resulting from the continuous parameters tuning, and a systematic approach to generate the FW BIC is still lacking. To address this, a method of actively forming FW BIC by matching the damping rate and resonance frequency of the coupling mode is proposed. As a proof-of-principle example, we propose a dielectric dimerized grating borophene heterostructure that generates a FW BIC near the commercially important communication wavelength. The coupling system comprises an electrically tunable borophene plasmon mode and a BIC supported by a dielectric dimer grating that can be attributed to the Brillouin zone folding. More interestingly, the BIC can be excited by the localized borophene plasmon (LBP) mode through near-field coupling as LBP mode can be considered as the dipole source. The interaction between them can further form the FW BIC, and support electromagnetically induced transparency (EIT)-like with maximum group index up to 2043, indicating its great potential for slow light applications. Our results provide a promising strategy and theoretical support for the generation of FW BIC in active plasmonic optical devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_10630 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Active formation of Friedrich-Wintgen bound states in the continuum in dielectric dimerized grating borophene heterostructure Yan, Xiao-Fei Wang, Xin-Yang Lin, Qi Wang, Ling-Ling Liu, Gui-Dong Optics The Friedrich-Wintgen bound state in the continuum (FW BIC) provides a unique approach for achieving high quality factor (Q-factor) resonance, which has attracted wide attention and promoted the development of various applications. However, the FW BIC is usually considered as accident BIC resulting from the continuous parameters tuning, and a systematic approach to generate the FW BIC is still lacking. To address this, a method of actively forming FW BIC by matching the damping rate and resonance frequency of the coupling mode is proposed. As a proof-of-principle example, we propose a dielectric dimerized grating borophene heterostructure that generates a FW BIC near the commercially important communication wavelength. The coupling system comprises an electrically tunable borophene plasmon mode and a BIC supported by a dielectric dimer grating that can be attributed to the Brillouin zone folding. More interestingly, the BIC can be excited by the localized borophene plasmon (LBP) mode through near-field coupling as LBP mode can be considered as the dipole source. The interaction between them can further form the FW BIC, and support electromagnetically induced transparency (EIT)-like with maximum group index up to 2043, indicating its great potential for slow light applications. Our results provide a promising strategy and theoretical support for the generation of FW BIC in active plasmonic optical devices. |
| title | Active formation of Friedrich-Wintgen bound states in the continuum in dielectric dimerized grating borophene heterostructure |
| topic | Optics |
| url | https://arxiv.org/abs/2401.10630 |