论文标题
双曲线杂晶的负折射
Negative refraction in hyperbolic hetero-bicrystals
论文作者
论文摘要
我们可视化了声子极化子的负折射，这发生在两个天然晶体之间的界面上。极性 - 红外光子和晶格振动的混合体形成了准直射线，在通过两种双曲线范德华材料之间的平面接口时表现出负折射：氧化钼（$ MOO_3 $）和同位素纯纯六龙甲nin骨（$ MOO_3 $）和nitride（$ h^{$ h^{11} bn $）。在特殊的频率$ω_0$的情况下，这些光线可以沿封闭的钻石形轨迹循环。我们已经表明，北极星特征模式显示了由偏极级排斥和强耦合产生的多个间隙中断的正色散区域。
We visualized negative refraction of phonon polaritons, which occurs at the interface between two natural crystals. The polaritons - hybrids of infrared photons and lattice vibrations - form collimated rays that display negative refraction when passing through a planar interface between the two hyperbolic van der Waals materials: molybdenum oxide ($MoO_3$) and isotopically pure hexagonal boron nitride ($h^{11}BN$). At a special frequency $ω_0$, these rays can circulate along closed diamond-shaped trajectories. We have shown that polariton eigenmodes display regions of both positive and negative dispersion interrupted by multiple gaps that result from polaritonic level repulsion and strong coupling.
