论文标题
在对称分类方案中的波导阵列中的BIC
BIC in waveguide arrays within a symmetry classification scheme
论文作者
论文摘要
我们研究了一个改良的Fano-Anderson模型的光子类似物 - 带有两个其他波导的波导阵列，并通过使用耦合模式理论来计算其光谱和散射特性。我们根据额外波导的自耦合系数给出的结构的垂直对称性对特征组化进行了分类，并确定了BIC存在的条件。我们使用WeierStrass分解定理，并用特征模词来解释具有断裂对称性的系统的散射光谱。与准BIC激发相关的FANO共振是由于该模式与另一种泄漏模式之间的干扰引起的。
We study a photonic analog of a modified Fano-Anderson model -- a waveguide array with two additional waveguides and by using the coupled mode theory we calculate its spectral and scattering properties. We classify eigenomodes according to vertical symmetry of the structure given by self-coupling coefficients of the additional waveguides and establish the conditions for BIC existence. We use the Weierstrass factorization theorem and interpret the scattering spectra of the systems with broken symmetry in terms of the eigenmodes. The Fano resonance related with excitation of quasi-BIC is explained as arising from the interference between this mode and another leaky mode.
