The interactions between light and matter are a central research focus in the field of photonics. Resonant cavities with high quality factors (Q) are capable to confine light effectively and exhibit ultra-long radiation lifetimes, making them essential for applications such as lasers, modulators, nonlinear optics, and quantum computing. Traditional methods for light confinement involve microring resonators, Bragg microcavities, photonic crystals, and so on. Bound states in the continuum (BICs) are unique nonradiative modes that exist within the radiation continuum, above the light line.

https://www.miragenews.com/latest-advancements-in-photonic-bound-states-1056161/

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