标题： 片上模式匹配腔磁子机械系统中的磁振子极化子生成 显示英文标题

标题： On-chip magnon polaron generation in mode-matched cavity magnomechanics

摘要： 产生磁振子极化子，即由于强磁振子-声子耦合而产生的混合态，是实现声学和自旋电子器件中相干操控的关键。 然而，传统的器件结构，即在厚压电层上的磁性薄膜，由于空间模式重叠非常小，往往难以实现大的磁振子-声子耦合。 在这里，我们通过使用模式匹配的片上磁机械系统实现了磁振子极化子的生成。 发现一种在几微米厚的磁层上的薄压电薄膜结构能够维持深度分布的磁振子模式，使得磁弹性耦合可以在几乎整个模式体积内与声子耦合。 增强的空间模式重叠产生了磁振子极化子，其光谱显示了明显的避让交叉。 这种磁机械系统将促进相干磁振子-声子转换及其混合态在功能声子器件中的应用。 显示英文摘要

摘要： Generation of magnon polarons, which are hybridized states resulting from strong magnon-phonon coupling, is a key to enabling coherent manipulation in acoustic and spintronic devices. However, the conventional device configuration, a magnetic thin film on a thick piezoelectric layer, often has difficulty achieving a large magnon-phonon coupling due to a very small spatial mode overlap. Here, we demonstrate generation of magnon polarons by using a mode-matched on-chip magnomechanical system. A configuration with a thin piezoelectric film on a magnetic layer several micrometers thick was found to sustain deeply distributed magnon modes that enable magnetoelastic coupling to phonons over almost the entire mode volume. The enhanced spatial mode overlap generated magnon polarons whose spectra showed distinct avoided crossing. This magnomechanical system will facilitate utilization of coherent magnon-phonon conversion and their hybrid states in functional phononic devices.