Longhi Stefano
Opt Lett. 2021 May 1;46(9):2091-2094. doi: 10.1364/OL.424756.
Photonic bound states in the continuum (BICs) are special localized and non-decaying states of a photonic system with a frequency embedded into the spectrum of scattered states. The simplest photonic structure displaying a single BIC is provided by two waveguides side-coupled to a common waveguide lattice, where the BIC is protected by symmetry. Here we consider such a simple photonic structure and show that by breaking mirror symmetry and allowing for non-nearest neighbor couplings, a doublet of quasi-BIC states can be sustained, enabling weakly damped embedded Rabi oscillations of photons between the waveguides.
连续统中的光子束缚态（BICs）是光子系统的特殊局域且非衰减态，其频率嵌入散射态谱中。展示单个BIC的最简单光子结构由两个侧向耦合到公共波导晶格的波导提供，其中BIC由对称性保护。在此，我们考虑这样一种简单的光子结构，并表明通过打破镜面对称性并允许非最近邻耦合，可以维持一对准BIC态，从而使光子在波导之间实现弱阻尼的嵌入式拉比振荡。
