AI 中文总结
该研究通过时域耦合模理论建模，探究有损三波导耦合微环谐振器的相位控制超模效应，研制出可按需呈现吸收或透明谐振峰的新型相干驱动有损耦合微环谐振器。
AI 中文摘要
在耦合微环谐振器（MRR）系统中，耦合过程对光学响应起关键决定作用，但这类结构的模型通常假设耦合过程为无损耗，或分别为仅含实部或仅含虚部耦合系数的耗散耦合。耗散耦合依赖于具有复杂耦合几何结构的相位工程结构，然而表现出“有损耦合”（即具有复值耦合系数）的系统却受到相对较少的关注。本研究采用时域耦合模理论（TCMT）对三波导耦合MRR系统的光学响应进行建模，以探究此类“有损”耦合的效应。“有损”耦合通过位于一对MRR之间的公共总线波导实现，由此产生一对本征谐振，其频率和线宽可通过控制来自任一MRR的耦合系数进行定制。我们拓展了上述思路，通过使用3dB Y型分路器连接输入（驱动）波导，演示了一种新型的相干驱动有损耦合MRR，该器件可通过相位控制超模按需呈现吸收或透明谐振峰。
英文摘要
In coupled micro-ring resonator (MRR) systems, the coupling process plays a critical role in determining the optical response, yet models of these structures typically assume this process to be either lossless, or dissipative with either purely real or purely imaginary coupling rate, respectively. Dissipative coupling is contingent on having appropriately phase engineered structures with intricate coupling geometries, but systems exhibiting `lossy coupling', i.e., characterized by complex-valued coupling rates, have received comparatively little attention. In this work, we investigate the effect of such `lossy' coupling, by modelling the optical response of a tri-waveguide coupled MRR system, using Temporal Coupled-Mode Theory (TCMT). The `lossy' coupling occurs via a common bus waveguide, positioned between a pair of MRRs, leading to the emergence of a pair of intrinsic resonances, whose frequency and linewidth may be tailored by controlling the respective coupling rates from either MRR. We develop these ideas, and by connecting the input (driving) waveguides, using a 3dB y-splitter, demonstrate a novel, coherently driven, lossy-coupled MRR, which exhibits either an absorptive or transparent resonance peak on demand by phase-controlled super-modes.
Commentsunder consideration by Optics Express
