Realizing quasi-bound states in the continuum with stable resonant wavelength through compensation mechanism
All-dielectric metasurfaces underpinned by the physics of bound states in the continuum (BICs) have surged interest due to their spectral selectivity and strong light confinement. In this work, We propose a compensation mechanism for SP-BIC with stable resonance wavelength and controllable Q-factor....
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379724001876 |
| _version_ | 1797259987700940800 |
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| author | Xupu Wu Deyong Xiong Gaofu Liu Yonggang Wu Maojin Yun Deliang Chen Xiaosi Qi |
| author_facet | Xupu Wu Deyong Xiong Gaofu Liu Yonggang Wu Maojin Yun Deliang Chen Xiaosi Qi |
| author_sort | Xupu Wu |
| collection | DOAJ |
| description | All-dielectric metasurfaces underpinned by the physics of bound states in the continuum (BICs) have surged interest due to their spectral selectivity and strong light confinement. In this work, We propose a compensation mechanism for SP-BIC with stable resonance wavelength and controllable Q-factor. Here we take metasurfaces consisting of four nano-square disks as an example to break the symmetry of the unit cell by both x-compensation and y-compensation, respectively, and the resonance wavelengths are stable. The results show that the four nanodisks are excited in two modes with x-compensation and y-compensation when only C2 symmetry is preserved, and in one mode with x-compensation and y-compensation when only σx symmetry is preserved. Multiple decomposition results show that the loop dipole and magnetic dipole dominate the modes that retain only C2 symmetry excitation. In contrast, the magnetic dipole dominates the mode that retains only the σx symmetry excitation. Both modes excited by the compensation mechanism have stable resonances with high q-factors under the condition of preserving only C2 symmetry or only σx symmetry. Metasurfaces realized by the compensation mechanism may find promising applications in enhanced light-matter interactions such as lasers, sensing, strong coupling, and nonlinear harmonic generation. |
| first_indexed | 2024-03-07T16:54:10Z |
| format | Article |
| id | doaj.art-c33967033e784267b3ee3a88f8f0f959 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-04-24T23:18:10Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-c33967033e784267b3ee3a88f8f0f9592024-03-17T07:53:44ZengElsevierResults in Physics2211-37972024-03-0158107505Realizing quasi-bound states in the continuum with stable resonant wavelength through compensation mechanismXupu Wu0Deyong Xiong1Gaofu Liu2Yonggang Wu3Maojin Yun4Deliang Chen5Xiaosi Qi6School of Physics and Electronic Science, Guizhou Education Universit, Guiyang 550025, ChinaSchool of Physics and Electronic Science, Guizhou Education Universit, Guiyang 550025, ChinaSchool of Physics and Electronic Science, Guizhou Education Universit, Guiyang 550025, ChinaSchool of Physics and Electronic Science, Guizhou Education Universit, Guiyang 550025, ChinaCollege of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, ChinaSchool of Physics and Electronic Science, Guizhou Education Universit, Guiyang 550025, China; Corresponding author.College of Physics, Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang 550025, ChinaAll-dielectric metasurfaces underpinned by the physics of bound states in the continuum (BICs) have surged interest due to their spectral selectivity and strong light confinement. In this work, We propose a compensation mechanism for SP-BIC with stable resonance wavelength and controllable Q-factor. Here we take metasurfaces consisting of four nano-square disks as an example to break the symmetry of the unit cell by both x-compensation and y-compensation, respectively, and the resonance wavelengths are stable. The results show that the four nanodisks are excited in two modes with x-compensation and y-compensation when only C2 symmetry is preserved, and in one mode with x-compensation and y-compensation when only σx symmetry is preserved. Multiple decomposition results show that the loop dipole and magnetic dipole dominate the modes that retain only C2 symmetry excitation. In contrast, the magnetic dipole dominates the mode that retains only the σx symmetry excitation. Both modes excited by the compensation mechanism have stable resonances with high q-factors under the condition of preserving only C2 symmetry or only σx symmetry. Metasurfaces realized by the compensation mechanism may find promising applications in enhanced light-matter interactions such as lasers, sensing, strong coupling, and nonlinear harmonic generation.http://www.sciencedirect.com/science/article/pii/S2211379724001876Stable resonance wavelengthsAll-dielectric metasurfaceBound states in the continuumCompensation mechanism |
| spellingShingle | Xupu Wu Deyong Xiong Gaofu Liu Yonggang Wu Maojin Yun Deliang Chen Xiaosi Qi Realizing quasi-bound states in the continuum with stable resonant wavelength through compensation mechanism Results in Physics Stable resonance wavelengths All-dielectric metasurface Bound states in the continuum Compensation mechanism |
| title | Realizing quasi-bound states in the continuum with stable resonant wavelength through compensation mechanism |
| title_full | Realizing quasi-bound states in the continuum with stable resonant wavelength through compensation mechanism |
| title_fullStr | Realizing quasi-bound states in the continuum with stable resonant wavelength through compensation mechanism |
| title_full_unstemmed | Realizing quasi-bound states in the continuum with stable resonant wavelength through compensation mechanism |
| title_short | Realizing quasi-bound states in the continuum with stable resonant wavelength through compensation mechanism |
| title_sort | realizing quasi bound states in the continuum with stable resonant wavelength through compensation mechanism |
| topic | Stable resonance wavelengths All-dielectric metasurface Bound states in the continuum Compensation mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2211379724001876 |
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