论文标题
通过共振状态扩展在连续体中诱导的FANO特征
Fano feature induced by a bound state in the continuum via resonant state expansion
论文作者
论文摘要
我们考虑通过嵌入在连续体（BIC）的光学结合状态的光谱附近的各向异性缺陷层的光散射。使用共振状态扩展方法，我们得出了一种用于反射和传输幅度的分析解决方案。分析溶液是通过用BIC作为零阶近似的扰动方法构建的。发现该溶液描述了BIC的光谱附近崩溃的Fano特征。通过与贝尔曼转移矩阵方法进行直接数值模拟的比较证实了这些发现。
We consider light scattering by an anisotropic defect layer embedded into anisotropic photonic crystal in the spectral vicinity of an optical bound state in the continuum (BIC). Using a resonant state expansion method we derive an analytic solution for reflection and transmission amplitudes. The analytic solution is constructed via a perturbative approach with the BIC as the zeroth order approximation. The solution is found to describe the collapsing Fano feature in the spectral vicinity of the BIC. The findings are confirmed via comparison against direct numerical simulations with the Berreman transfer matrix method.
