论文标题
$ \ mathcal {pt} $耦合平板waveguide中的超亮体和潜意识群速度之间的奇异光线过渡
Exotic light transition between superluminal and subliminal group velocity in a $\mathcal{PT}$ coupled slab waveguide
论文作者
论文摘要
我们提出了一项基于特征模式方法的严格全波模态分析（\ textquotedblleft supermodes \ textquotedblright），它允许计算横向电气（$ te $）和横向磁性（$ tm $）平稳的传播eigenmodes in coupled $ \ natercal waver prave sysse cysement clab cysement-syse cyguguged-sysemcug and-pt} - pt} pt}。我们的发现表明，对于基本的$ te_ {0} $ supermode而言，该组速度从临界点（CP）的两侧（cp）的两侧（EP）的两侧通过。我们还证明了第一个高阶超模型$ te_ {1} $在EP周围表现出慢灯现象。
We propose a rigorous full-wave modal analysis based on the eigenmodes approach (\textquotedblleft supermodes\textquotedblright), that allows the calculation of the transverse electric ($TE$) and transverse magnetic ($TM$) stationary propagation eigenmodes in a coupled $\mathcal{PT}$-symmetric slab waveguide. Our findings show that the group velocity, for the fundamental $TE_{0}$ supermode, passes from superluminal to subluminal speed over both sides of a critical point (CP), located near to the exceptional point (EP). We also demonstrate that the first higher-order supermode, $TE_{1}$, exhibits a slow light phenomenon around the EP.
