Bound states in the continuum in circular clusters of scatterers
| Autor: | Marc Martí-Sabaté, Bahram Djafari-Rouhani, Dani Torrent |
|---|---|
| Přispěvatelé: | Institut de Noves Tecnologies de la Imatge (INIT), Universitat Jaume I, Physique - IEMN (PHYSIQUE - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), ACKNOWLEDGMENTS D.T. acknowledges financial support through a 'Ramón y Cajal' fellowship, under Grant No. RYC-2016-21188.This research was supported by the DYNAMO project (101046489), funded by the European Union, but the views and opinions expressed are, however, those of the authors only and do not necessarily reflect those of the European Union or the European Innovation Council. Neither the European Union nor the granting authority can be held responsible for them. M.M.-S. acknowledges financial support through the FPU program under Grant No. FPU18/02725. This publication is part of Project No. PID2021-124814NB-C22, funded by MCIN/AEI/10.13039/501100011033, 'FEDER, A way of making Europe., Institut de Noves Tecnologies de la Imatge [INIT], Physique - IEMN [PHYSIQUE - IEMN] |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
[PHYS]Physics [physics]
Classical Physics (physics.class-ph) FOS: Physical sciences General Physics and Astronomy Applied Physics (physics.app-ph) Physics - Classical Physics Physics - Applied Physics [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics Optics (physics.optics) Physics - Optics |
| Zdroj: | Physical Review Research Physical Review Research, 2023, 5 (1), pp.013131. ⟨10.1103/PhysRevResearch.5.013131⟩ |
| ISSN: | 2643-1564 |
| DOI: | 10.1103/PhysRevResearch.5.013131⟩ |
| Popis: | International audience; ABSTRACTIn this work we study the localization of flexural waves in highly symmetric clusters of scatterers. It is shown that when the scatterers are placed regularly in the perimeter of a circumference, the quality factor of the resonances strongly increases with the number of scatterers in the cluster. It is also found that in the continuous limit, that is to say, when the number of scatterers tends to infinite, the quality factor is infinite so that the modes belong to the class of the so-called bound states in the continuum or BICs, and an analytical expression for the resonant frequency is found. These modes have different multipolar symmetries, and we show that for high multipolar orders the modes tend to localize at the border of the circumference, therefore forming a whispering gallery mode with an extraordinarily high quality factor. Numerical experiments are performed to check the robustness of these modes under different types of disorder and also to study their excitation from the far field. Although we have focused our study on flexural waves, the methodology presented in this work can be applied to other classical waves, like electromagnetic or acoustic waves, being a promising approach for the design of high-quality resonators based on finite clusters of scatterers. |
| Databáze: | OpenAIRE |
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