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- W4384261698 abstract "Moir'e structures are receiving increasing attention in nanophotonics as they support intriguing optical phenomena. In the so-called magic configuration, one-dimensional moir'es give rise to fully dispersionless energy bands known as flatbands, where the light is tightly localized within each supercell of the periodic moir'e. The goal of this investigation is to determine to what extent the confinement of light, observed in periodic structures, is preserved in microcavities of finite size. Here we analyze the optical response of finite moir'e structures consisting of one, two, or more supercells of 1D moir'e. Our calculations reveal that for single-supercell cavity, the magic configuration does not impact the electric field confinement at the wavelength of the flat band modes. However, when three or more supercells are connected, we show that the coupling between supercells is canceled at the magic configuration, resulting in highly confined modes with a quality factor greater than $10^6$ and exhibiting the characteristics of a quasi-bound state in the continuum where optical losses are eliminated through a destructive interference process." @default.
- W4384261698 created "2023-07-14" @default.
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- W4384261698 date "2023-07-07" @default.
- W4384261698 modified "2023-09-25" @default.
- W4384261698 title "How many supercells are required to achieve unconventional light confinement effects in moir'e photonic lattices?" @default.
- W4384261698 doi "https://doi.org/10.48550/arxiv.2307.05525" @default.
- W4384261698 hasPublicationYear "2023" @default.
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