Magneto-optical Guided-Wave Devices for Microwave and Optical Signal Processing

在以前的NSF支持下，我们已经开始了 仔细研究模式转换之间 磁性石榴石薄膜中的导模 微波静磁感应薄膜 波 这种相互作用可能导致新的 微波与光信号处理 包括微波频谱的装置 分析仪和光频移器。 我们 我建议继续这项工作， 与提高转化率有关的两个问题 效率源于互动。 一、微波非线性现象 当高微波功率 用于实现高效模式转换的 不仅要研究 微波频谱，但通过检查 转换模式的光谱， 衍射光束的角分布。 第二，我们建议研究光学模式 静磁波感应转换 在石榴石的另一层中传播 异质结构 以往的理论研究 已经提出有效的模式转换 可能更容易在异质结构中获得， 具有针对微波优化的单独层 和光学性质，而不是在一个单一的 磁性层

With previous NSF support, we have begun a careful study of mode conversion between optical guided modes in magnetic garnet thin films induced by microwave magnetostatic waves. This interaction may lead to new microwave and optical signal processing devices including microwave spectrum analyzers and optical frequency shifters. We propose to continue this work by studying two issues related to increasing the conversion efficiency resulting from the interaction. First, the microwave nonlinear phenomena which occur when high microwave power is used to achieve efficient mode conversion will be studied by not only examining the microwave spectrum, but by examining the optical spectrum of the converted mode and the angular distribution of the diffracted beam. Second, we propose to study optical mode conversion induced by magnetostatic waves propagating in a separate layer of a garnet heterostructre. Previous theoretical studies have suggested that efficient mode conversion may be easier to obtain in a heterostructre, with separate layers optimized for microwave and optical properties, than in a single magnetic layer.