Department of Electrical Engineering, Yale University, 15 Prospect Street, New Haven, Connecticut 06511, USA.
Nat Commun. 2015 Jan 14;6:5850. doi: 10.1038/ncomms6850.
Electromagnetically induced transparency has great theoretical and experimental importance in many areas of physics, such as atomic physics, quantum optics and, more recent, cavity optomechanics. Optical delay is the most prominent feature of electromagnetically induced transparency, and in cavity optomechanics, the optical delay is limited by the mechanical dissipation rate of sideband-resolved mechanical modes. Here we demonstrate a cascaded optical transparency scheme by leveraging the parametric phonon-phonon coupling in a multimode optomechanical system, where a low damping mechanical mode in the unresolved-sideband regime is made to couple to an intermediate, high-frequency mechanical mode in the resolved-sideband regime of an optical cavity. Extended optical delay and higher transmission as well as optical advancing are demonstrated. These results provide a route to realize ultra-long optical delay, indicating a significant step towards integrated classical and quantum information storage devices.
电磁感应透明在物理学的许多领域都具有重要的理论和实验意义，如原子物理学、量子光学，以及最近的腔光机械。光延迟是电磁感应透明的最显著特征，在腔光机械中，光延迟受到机械边带分辨模式的机械耗散率的限制。在这里，我们通过利用多模光机械系统中的参量声子-声子耦合，展示了级联光透明方案，其中在未分辨边带的低阻尼机械模式被耦合到光学腔的分辨边带的中间高频机械模式。我们演示了扩展的光延迟、更高的传输率以及光超前。这些结果为实现超长光延迟提供了一种途径，表明朝着集成经典和量子信息存储设备迈出了重要一步。
