Opt Lett. 2023 Mar 1;48(5):1164-1167. doi: 10.1364/OL.482999.
We propose a scheme to generate magnon-induced absorption (MIA) in a two-cavity magnonics system. By placing an yttrium iron garnet (YIG) sphere into one of two coupled microwave cavities, three different interference pathways are established by the photon coupling and magnon-photon coupling, leading to the conversion from suppression to enhancement on resonance under proper conditions. Most interestingly, the analytical results of the probe absorption are solved based on bright and dark modes in a dressed-state picture, which can be used to explain the position, width, and height of the absorption peaks accurately. Furthermore, we investigate the noise spectral density (NSD) of the microwave cavity and find out the similar MIA phenomena, which may provide a feasible way to remotely detect a magnon with an optical method.
我们提出了一种在双腔磁振子系统中产生磁振子诱导吸收（MIA）的方案。通过将钇铁石榴石（YIG）球放置在两个耦合微波腔之一中，通过光子耦合和磁子-光子耦合建立了三种不同的干涉路径，从而在适当的条件下实现了从抑制到增强的共振转换。最有趣的是，基于修饰态图中的亮模和暗模，对探针吸收的解析结果进行了求解，这可以准确地解释吸收峰的位置、宽度和高度。此外，我们研究了微波腔的噪声谱密度（NSD），并发现了类似的 MIA 现象，这可能为使用光学方法远程探测磁子提供了一种可行的方法。
