论文标题
散装半导体中的极地元素的Weyl点和特殊环
Weyl points and exceptional rings with polaritons in bulk semiconductors
论文作者
论文摘要
在三维色散关系中，Weyl点是最简单的拓扑保护的退化。光子晶体中Weyl半法的实现使这些奇异性及其后果可以通过电磁波探索。但是，在此类系统中很难实现非线性。一种有前途的方法是使用光子和激子的强偶联，因为所得的极性子通过其激子成分相互作用。然而，拓扑极化只有两个维度才实现。在这里，我们预测，在具有施加磁场的散装半导体中，极性子在三个维度上的色散关系包含Weyl点和Weyl线节点。我们表明吸收将这些Weyl点转换为Weyl异常环。我们得出的结论是，批量半导体是一个有前途的系统，在该系统中，在三个维度上研究拓扑光子学以及耗散，增益和非线性的影响。
Weyl points are the simplest topologically-protected degeneracy in a three-dimensional dispersion relation. The realization of Weyl semimetals in photonic crystals has allowed these singularities and their consequences to be explored with electromagnetic waves. However, it is difficult to achieve nonlinearities in such systems. One promising approach is to use the strong-coupling of photons and excitons, because the resulting polaritons interact through their exciton component. Yet topological polaritons have only been realized in two dimensions. Here, we predict that the dispersion relation for polaritons in three dimensions, in a bulk semiconductor with an applied magnetic field, contains Weyl points and Weyl line nodes. We show that absorption converts these Weyl points to Weyl exceptional rings. We conclude that bulk semiconductors are a promising system in which to investigate topological photonics in three dimensions, and the effects of dissipation, gain, and nonlinearity.
