Enhancing resonance wave–matter interaction in finite-size dielectric metasurfaces

Document Type

Article

Publication Date

7-1-2026

Abstract

We investigate the dramatic effects produced by the presence of physical boundaries of finite-size metasurfaces (MSs), composed of identical cylindrical dielectric resonators without broken symmetry, on the complexity of their responses, observed at normal plane wave incidence, when constituent particles can support only dipolar Mie resonances. We demonstrate the possibility to excite extra high-quality resonance modes in these finite structures, which are quite distinct from the modes in infinite structures. We explore the formation of different types of high-quality modes in MS fragments of different configurations and sizes, which makes it possible to provide guidance for configuring their optimal designs. We show that the features characteristic of the responses of MSs composed of nano-sized silicon resonators and operating in the optical range can be reproduced in the microwave range for re-scaled structures composed of mm-sized ceramic resonators. The analysis of energy band diagrams reveals that breaking the structural symmetry owing to its finiteness led to the coupling of dark guided Bloch modes to bright Mie resonances, resulting in the formation of coupled high-quality bonding-type modes. Energy trapping in bonding modes along with Fabry–Perot resonances enhanced the quality of hybrid resonance modes. The overlapping of the obtained results with the existing theories of high-quality integrated resonances is discussed.

Publication Title

Journal of Optics United Kingdom

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