标题： 腔磁子力学中的可调光学放大和群延迟 显示英文标题

标题： Tunable optical amplification and group delay in cavity magnomechanics

摘要： 在本工作中，我们理论研究了混合腔磁机械系统（CMM）中可控的输出探测传输和群延迟。 该装置包括一个有源（增益）腔和一个无源（损耗）腔，其中包含一个光学参量放大器（OPA）和两个钇铁石榴石球，以促进磁子-光子耦合。 与通常由磁子-光子相互作用产生的单个透明窗口不同，我们还观察到了由于非线性磁子-声子相互作用引起的磁机械诱导透明。 此外，可以通过改变不同的系统参数，将中心吸收峰两侧的两个吸收凹陷不对称地调制成放大和吸收。 在平衡和不平衡的增益-损耗情况下，观察到了PT对称到破缺PT对称的相变。 值得注意的是，将第二个无源腔替换为有源腔可以减轻高吸收并为系统引入有效的增益。 我们的研究结果表明，通过修改各种系统参数，探测光的群延迟可以在正负值之间调整。 这项研究为控制CMM系统中的光传播提供了一个稳健的平台，突显了其在光通信和信号处理中的潜在应用。 显示英文摘要

摘要： In this work, we theoretically investigate the controllable output probe transmission and group delay in a hybrid cavity magnomechanics (CMM) system. The setup comprises a gain (active) cavity and a passive (loss) cavity, which incorporates an optical parametric amplifier (OPA) and two yttrium iron garnet spheres to facilitate magnon-photon coupling. Unlike the single transparency window typically resulting from magnon-photon interactions, we also observe magnomechanically induced transparency due to nonlinear magnon-phonon interactions. Additionally, two absorption dips on either side of the central absorption dip can be asymmetrically modulated into amplification and absorption by varying different system parameters. A PT-symmetric to broken-PT-symmetric phase transition is observed in both balanced and unbalanced gain-to-loss scenarios. Notably, replacing the second passive cavity with an active one mitigates high absorption and introduces effective gain into the system. Our findings reveal that the group delay of the probe light can be adjusted between positive and negative values by modifying various system parameters. This study provides a robust platform for controlling light propagation in CMM systems, highlighting potential applications in optical communication and signal processing.