Anapole mechanism of bound states in the continuum in symmetric dielectric metasurfaces

verfasst von: Izzatjon Allayarov, Antonio Calà Lesina, Andrey B. Evlyukhin
Abstract: We present a general multipole mechanism based on the lattice anapole effect leading to the excitation of high-Q resonances in dielectric metasurfaces with the simplest unit cell (i.e., a unit cell with inversion symmetry containing only one nanostructure) and irradiation conditions (i.e., normal incidence). Using multipole techniques, we show analytically and numerically that these resonances are related to the conversion of bound states in the continuum (BICs) to quasi-BICs by simply changing the metasurface period. It is also shown that BICs and quasi-BICs, in turn, are realized through destructive interference (anapole effect) between multipoles of the same parity. The main advantage of such a conversion BIC to quasi-BIC compared to those proposed earlier is that it does not require distortion of symmetric properties of metasurfaces, special conditions of irradiation, or displacement of elements in composite unit cells. The results obtained give an important insight into the physics of high-Q resonances in meta-optics and can simplify and expand the application of metasurfaces for tunable lasing, nonlinear generation, energy trapping manipulation, and enhanced sensing techniques.
Organisationseinheit(en): Institut für Transport- und Automatisierungstechnik
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
Hannoversches Zentrum für Optische Technologien (HOT)
Computergestützte Photonik
Institut für Quantenoptik
Typ: Artikel
Journal: Physical Review B
Band: 109
Anzahl der Seiten: 7
ISSN: 2469-9950
Publikationsdatum: 21.06.2024
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie
Elektronische Version(en): https://doi.org/10.1103/PhysRevB.109.L241405 (Zugang: Geschlossen)

BibTeX

@article{5207b8a6a775417b82af0ef3e8999a40,
title = "Anapole mechanism of bound states in the continuum in symmetric dielectric metasurfaces",
abstract = "We present a general multipole mechanism based on the lattice anapole effect leading to the excitation of high-Q resonances in dielectric metasurfaces with the simplest unit cell (i.e., a unit cell with inversion symmetry containing only one nanostructure) and irradiation conditions (i.e., normal incidence). Using multipole techniques, we show analytically and numerically that these resonances are related to the conversion of bound states in the continuum (BICs) to quasi-BICs by simply changing the metasurface period. It is also shown that BICs and quasi-BICs, in turn, are realized through destructive interference (anapole effect) between multipoles of the same parity. The main advantage of such a conversion BIC to quasi-BIC compared to those proposed earlier is that it does not require distortion of symmetric properties of metasurfaces, special conditions of irradiation, or displacement of elements in composite unit cells. The results obtained give an important insight into the physics of high-Q resonances in meta-optics and can simplify and expand the application of metasurfaces for tunable lasing, nonlinear generation, energy trapping manipulation, and enhanced sensing techniques.",
author = "Izzatjon Allayarov and {Cal{\`a} Lesina}, Antonio and Evlyukhin, {Andrey B.}",
note = "Publisher Copyright: {\textcopyright} 2024 American Physical Society.",
year = "2024",
month = jun,
day = "21",
doi = "10.1103/PhysRevB.109.L241405",
language = "English",
volume = "109",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Institute of Physics",
number = "24",
}