论文标题
在非温和格劳伯氏晶格的特殊点处的无衍射光束传播
Diffraction-free beam propagation at the exceptional point of non-Hermitian Glauber Fock lattices
论文作者
论文摘要
我们构建位于由耦合波导制成的非铁晶石（NGF）晶格的边缘的局部梁，并且可以很长的远距离传播而无需几乎没有衍射。具体而言，我们在半无限NGF晶格的特殊点计算了由单向方式耦合的波导的特殊点。我们使用封闭形式的解决方案在有限的NGF晶格中构造非裂开光束。我们提供了一种数值方法，可以找到其他能够在特殊点上支撑非划分光束的晶格。
We construct localized beams that are located at the edge of a non-Hermitian Glauber Fock (NGF) lattice made of coupled waveguides and can propagate for a long distance without almost no diffraction. Specifically, we calculate the closed-form of the eigenstates at the exceptional point of a semi-infinite NGF lattice composed of waveguides which are coupled in a unidirectional manner. We use the closed-form solution to construct the non-diffracting beams in finite NGF lattices. We provide a numerical approach to find other lattices that are capable of supporting non-diffracting beams at an exceptional point.
