论文标题
与光栅诱导的高质量光学TAMM状态的关键耦合涡流
Critical coupling vortex with grating-induced high quality optical Tamm states
论文作者
论文摘要
我们研究了由放置在分布式布拉格反射器顶部的介电光栅支持的光学TAMM状态。发现在某些条件下，塔姆状态可能会成为连续体中的约束状态。绑定状态依次诱导临界耦合与反射振幅的效果达到精确的零。我们证明，临界耦合点位于在波长和入射角的空间中反射振幅梯度的涡流中的核心。涡旋的出现通过耦合模式理论来解释。
We investigate optical Tamm states supported by a dielectric grating placed on top of a distributed Bragg reflector. It is found that under certain conditions the Tamm state may become a bound state in the continuum. The bound state, in its turn, induces the effect of critical coupling with reflectance amplitude reaching an exact zero. We demonstrate that the critical coupling point is located in the core of a vortex of the reflection amplitude gradient in space of wavelength and angle of incidence. The emergence of the vortex is explained by the coupled mode theory.
