论文标题
在开放系统中连续体中的孤立频谱绑定状态
Solitary Spectrally-Discrete Bound States in the Continuum in an Open System
论文作者
论文摘要
连续体（BICS）中的界面存在于多种物理系统中，它们看起来是被辐射模式包围的无损传播状态。但是，在开放系统的情况下，它们与位于频率momentum参数空间不同区域的模式或其他BIC的连续家族共存。在这里，我们报告说，波导结构包括各向异性材料，上面有两个辐射通道，其中不可能连续的模式家庭支持单个频率和单个传播方向存在的离散BIC。结果是隔离的频谱散落的BIC状态，作为从辐射泄漏模式的海洋中出现的无损针。
Bound states in the continuum (BICs) exist in a variety of physical systems where they appear as lossless propagating states surrounded by radiating modes. However, in the case of open systems, they coexist with continuous families of guided states, which may be modes or other BICs, located in different regions of the frequency-momentum parameter space. Here we report that waveguiding structures comprising anisotropic materials with two radiation channels where continuous families of modes are not possible whatsoever can support discrete BICs that exist for a single frequency and a single propagation direction. The results are isolated spectrally-discrete BIC states existing as lossless needles emerging from a sea of radiating leaky modes.
