Department of Physics, Lancaster University, Lancaster LA1 4YB, UK.
Opt Lett. 2013 Jun 1;38(11):1912-4. doi: 10.1364/OL.38.001912.
One of the principal goals in the design of photonic crystals is the engineering of band gaps and defect states. Here I describe the formation of topologically protected localized midgap states in systems with spatially distributed gain and loss. These states can be selectively amplified, which finds applications in the beam dynamics along a photonic lattice and in the lasing of quasi-one-dimensional photonic crystals.
光子晶体设计的主要目标之一是能带隙和缺陷态的工程设计。在这里，我描述了在具有空间分布增益和损耗的系统中形成拓扑保护的局域带隙态。这些状态可以被选择性地放大，这在光子晶格中的光束动力学和准一维光子晶体的激光方面有应用。
