4.6 Article

Universal coupled theory for metamaterial bound states in the continuum

期刊

NEW JOURNAL OF PHYSICS
卷 23, 期 9, 页码 -

出版社

IOP Publishing Ltd
DOI: 10.1088/1367-2630/ac20e9

关键词

metamaterial; bound states in the continuum; coupled-mode theory

资金

  1. National Key Research and Development Program of China [2019YFB2203901]
  2. National Science and Technology Major Project [2017ZX02101007-003]
  3. National Natural Science Foundation of China [61565004, 61965005, 61975038, 62005059]
  4. Science and Technology Program of Guangxi Province [2018AD19058]
  5. Innovation Project of GUET Graduate Education [2021YCXS129]
  6. Guangxi oversea 100 talent project
  7. Guangxi distinguished expert project

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This paper introduces a novel universal coupled theory for metamaterial bound states in the continuum or quasi-bound states in the continuum, providing ultra-high Q resonance for metamaterial devices with greater accuracy compared to previous theories. It accurately predicts the transmission spectrum of metamaterial BIC or quasi-BIC for the first time, making it more suitable for predicting BIC or quasi-BIC in metamaterials.
In this paper, we present a novel universal coupled theory for metamaterial bound states in the continuum (BIC) or quasi-bound states in the continuum (quasi-BIC) which provides ultra-high Q resonance for metamaterial devices. Our theory analytically calculates the coupling of two bright modes with phase information. Our method has much more accuracy for ultra-strong coupling comparing with the previous theories (the coupling of one bright mode and one dark mode and the two bright-mode coupling). Therefore, our theory is much more suitable for BIC or quasi-BIC and we can accurately predict the transmission spectrum of metamaterial BIC or quasi-BIC for the first time.

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