Academic Journal
Delocalized electric field enhancement through near-infrared quasi-BIC modes in a hollow cuboid metasurface
| العنوان: | Delocalized electric field enhancement through near-infrared quasi-BIC modes in a hollow cuboid metasurface |
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| المؤلفون: | Algorri Genaro, José Francisco, Dmtriev, Victor, López Higuera, José Miguel, Zografopoulos, Dimitrios C. |
| المساهمون: | Universidad de Cantabria |
| المصدر: | Nanomaterials, 2023, 13(20), 2771 |
| بيانات النشر: | MDPI |
| سنة النشر: | 2023 |
| المجموعة: | Universidad de Cantabria: UCrea |
| مصطلحات موضوعية: | Dielectric metasurfaces, Bound states in the continuum, Sensing devices, Spectroscopy |
| الوصف: | The two main problems of dielectric metasurfaces for sensing and spectroscopy based on electromagnetic field enhancement are that resonances are mainly localized inside the resonator volume and that experimental Q-factors are very limited. To address these issues, a novel dielectric metasurface supporting delocalized modes based on quasi-bound states in the continuum (quasi-BICs) is proposed and theoretically demonstrated. The metasurface comprises a periodic array of silicon hollow nanocuboids patterned on a glass substrate. The resonances stem from the excitation of symmetry-protected quasi-BIC modes, which are accessed by perturbing the arrangement of the nanocuboid holes. Thanks to the variation of the unit cell with a cluster of four hollow nanocuboids, polarization-insensitive, delocalized modes with ultra-high Q-factor are produced. In addition, the demonstrated electric field enhancements are very high (10³-10⁴). This work opens new research avenues in optical sensing and advanced spectroscopy, e.g., surface-enhanced Raman spectroscopy. ; This work is part of the PID2019-107270RB-C21, PDC2021-121172-C21m and TED2021-130378B-C21 project funded by MCIN/AEI/10.13039/501100011033, FEDER, and EU NextGenerationEU/PRT. J.F.A. received funding from Ministerio de Ciencia, Innovación y Universidades of Spain under Juan de la Cierva-Incorporación grant. D.C.Z and V.D. acknowledge the support of the CNR-FAPESP biennial (2022–2023) bilateral project StReAM “Strongly Resonant All-dielectric Metasurfaces based on quasi-dark and toroidal modes”. V.D. thanks the Brazilian Agency National Council of Technological and Scientific Development (CNPq) for financial support. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2079-4991 |
| Relation: | PID2019-107270RB-C21; PDC2021-121172-C21; TED2021-130378B-C21; https://hdl.handle.net/10902/30602 |
| DOI: | 10.3390/nano13202771 |
| الاتاحة: | https://hdl.handle.net/10902/30602 https://doi.org/10.3390/nano13202771 |
| Rights: | http://creativecommons.org/licenses/by/4.0/ ; openAccess |
| رقم الانضمام: | edsbas.BB1FB32F |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 20794991 |
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| DOI: | 10.3390/nano13202771 |