论文标题
在连续体中具有结合状态的周期结构的真实传播和反射零
Real transmission and reflection zeros of periodic structures with a bound state in the continuum
论文作者
论文摘要
对于具有适当对称性的无损周期性结构，传输和反射光谱通常分别具有$ 100 \％$和$ 0 \％$的峰值和倾角。完整的峰和零倾角通常出现在谐振频率附近，并且相对于保留所需对称性的结构扰动，它们相对于结构扰动。但是，目前关于完整峰和零下降的理论是不完整且难以使用的。对于在连续体（BIC）中具有结合状态的周期性结构，我们提出了一种关于存在的真实传播和反射零的新理论，该理论与传输和反射光谱中的零下降相对应。我们的理论相对简单，完整且易于使用。提出了数值示例以验证新理论。
For lossless periodic structures with a proper symmetry, the transmission and reflection spectra often have peaks and dips that are truly $100\%$ and $0\%$, respectively. The full peaks and zero dips typically appear near resonant frequencies, and they are robust with respect to structural perturbations that preserve the required symmetry. However, current theories on the existence of full peaks and zero dips are incomplete and difficult to use. For periodic structures with a bound state in the continuum (BIC), we present a new theory on the existence of real transmission and reflection zeros that correspond to the zero dips in the transmission and reflection spectra. Our theory is relatively simple, complete, and easy to use. Numerical examples are presented to validate the new theory.
