论文标题
使用相位变化材料在等离子体系统中的拓扑边缘状态之间切换
Switching between topological edge states in plasmonic systems using phase-change materials
论文作者
论文摘要
我们根据Aubry-Andre-Harper模型介绍了非Hermitian等离子波导式腔体结构，以实现使用相位变化材料GE $ _2 $ _2 $ _2 $ _2 $ _2 $ _5 $ _5 $（GST）在右和左拓扑边缘状态（TESS）之间切换。我们表明，在GST的晶体和无定形阶段之间切换会导致优化结构的分散关系的变化，从而使晶相的右TES和无定形相的左TES出现在相同的频率下。因此，我们通过在GST的晶体和无定形阶段进行切换来意识到以该频率的左右苔丝之间的切换。我们的结果对于开发紧凑的可重构拓扑光子设备可能非常重要。
We introduce non-Hermitian plasmonic waveguide-cavity structures based on the Aubry-Andre-Harper model to realize switching between right and left topological edge states (TESs) using the phase-change material Ge$_2$Sb$_2$Te$_5$ (GST). We show that switching between the crystalline and amorphous phases of GST leads to a shift of the dispersion relation of the optimized structure so that a right TES for the crystalline phase, and a left TES for the amorphous phase occur at the same frequency. Thus, we realize switching between right and left TESs at that frequency by switching between the crystalline and amorphous phases of GST. Our results could be potentially important for developing compact reconfigurable topological photonic devices.
