Universal coupled theory for metamaterial bound states in the continuum

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.

Automated summary

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.