论文标题
低损失零索引材料
Low-loss Zero-Index Materials
论文作者
论文摘要
具有零折射率的材料支持具有固定相曲线的电磁模式。尽管在可见的和近红外光谱范围内已经实现了此类材料，但辐射和耗散光损失阻碍了它们的发展。我们通过通过谐振和对称性保护的状态引入高Q共振，从而减少零索引的芯片光子晶体中的损失。使用这些方法，我们在近红外波长下实验获得了2.6*10^3和7.8*10^3的质量因子，对应于先前设计的传播损失的降低顺序。我们的工作提出了一种可行的方法，可以用低损失制造零索引纳米光子设备。
Materials with a zero refractive index support electromagnetic modes that exhibit stationary phase profiles. While such materials have been realized across the visible and near-infrared spectral range, radiative and dissipative optical losses have hindered their development. We reduce losses in zero-index, on-chip photonic crystals by introducing high-Q resonances via resonance-trapped and symmetry-protected states. Using these approaches, we experimentally obtain quality factors of 2.6*10^3 and 7.8*10^3 at near-infrared wavelengths, corresponding to an order-of-magnitude reduction in propagation loss over previous designs. Our work presents a viable approach to fabricate zero-index on-chip nanophotonic devices with low-loss.
