论文标题
退化分布式反馈光子结构，具有双光栅表现为退化带边缘
Degenerate Distributed Feedback Photonic Structure with Double Grating Exhibiting Degenerate Band Edge
论文作者
论文摘要
我们提出了与退化带边缘（DBE）相关的Bragg条件的退化版本。可以使用在常规带边缘运行的定期光栅来实现标准的Bragg条件。我们建议意识到DBE的结构是由两个堆叠的相同光栅制成的，这些光栅形成了两个耦合的周期性波导和破碎的镜子对称性。使用全波模拟，通过使用本征模求解器和散射参数的计算来验证DBE的出现。提出的结构是构想在DBE运行的退化分布式反馈激光器的好候选者。
We propose a degenerate version of the Bragg condition, associated to a degenerate band edge (DBE). A standard Bragg condition can be implemented using a periodic grating that operates at the regular band edge. The structure we propose to realize a DBE is made of two stacked identical gratings that form two coupled periodic waveguides with broken mirror symmetry. The occurrence of the DBE is verified by using both an eigenmode solver and the calculations of scattering parameters, using full-wave simulations. The proposed structure is a good candidate to conceive a degenerate distributed feedback lasers operating at the DBE.
