标题： 基于慢光的超高Q可调谐微环谐振器 显示英文标题

标题： Ultra High-Q tunable microring resonators enabled by slow light

摘要： 高品质因子纳米光子谐振器对于经典和量子光学处理、通信、传感等诸多应用至关重要。我们通过在谐振腔内制备高度透明且色散强烈的介质，从而减小群速度，实现了超高品质因子，使品质因子提高了近三个数量级。我们通过铒掺杂薄膜锂铌酸盐微环谐振器中的光谱烧孔实现这一点，并展示了超过$10^8$的 Q 因子。此外，我们还表明，频域窄化的共振与更宽的裸共振之间的相互作用产生了一个法诺线型，该线型可以通过电光调谐动态控制。最后，我们提出了一个理论模型来解释实验中观察到的谐振器线宽，这些线宽无法用标准的布洛赫方程很好地描述。我们的结果显示，在强光驱动下铒的退相率显著降低，因此即使谐振器中有较大的循环强度，其线宽也比预期窄得多。 显示英文摘要

摘要： High-Q nanophotonic resonators are crucial for many applications in classical and quantum optical processing, communication, sensing, and more. We achieve ultra-high quality factors by preparing a highly transparent and strongly dispersive medium within a resonator, causing a reduction in the group velocity that leads to a nearly three order of magnitude increase in the quality factor. We implement this via spectral hole burning in erbium-doped thin-film lithium niobate microring resonators, and show Q-factors exceeding $10^8$. Additionally, we show that the interplay between the spectrally narrowed resonance and the broader bare resonance produces a Fano lineshape, which we dynamically control via electro-optic tuning. Finally, we present a theoretical model for our experimentally observed resonator linewidths, which are not well-described by the standard Bloch equations. Our results show a dramatic reduction in the erbium dephasing rate under a strong optical drive, leading to much narrower linewidths than would otherwise be expected given the large circulating intensity in the resonator.