High-frequency cavity optomechanics using bulk acoustic phonons
High-frequency cavity optomechanics using bulk acoustic phonons
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DOI：
10.1126/sciadv.aav0582
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发表时间：
2019-04-01
期刊：
影响因子：
13.6
通讯作者：
Rakich, Peter T.
中科院分区：
文献类型：
--
作者：
Kharel, Prashanta;Harris, Glen I.;Rakich, Peter T.
到目前为止，微米级和纳米级光学机械系统已经通过访问容易冷却到其热基态的高频（千兆赫）声子模式实现了许多原理验证量子操作。然而，极少量的吸收光会产生过度的热量，这可能会危及这些微结构内强大的基态操作。相比之下，我们展示了一种替代策略，用于访问高频（13 GHz）声子在宏观系统（厘米尺度）使用相位匹配的布里渊相互作用之间的两个不同的光学腔模式。与直觉相反，我们表明，这些宏观系统的运动质量比微观系统大100万到1亿倍，为强大的基态操作提供了一条互补的道路。我们进行光机械诱导的放大/透明度测量，并证明体声子模式的参数不稳定性。这是使用这些分束器和体声波系统中的双模压缩相互作用的重要一步，其应用范围从量子存储器和微波到光转换到高功率激光振荡器。
To date, microscale and nanoscale optomechanical systems have enabled many proof-of-principle quantum operations through access to high-frequency (gigahertz) phonon modes that are readily cooled to their thermal ground state. However, minuscule amounts of absorbed light produce excessive heating that can jeopardize robust ground-state operation within these microstructures. In contrast, we demonstrate an alternative strategy for accessing high-frequency (13 GHz) phonons within macroscopic systems (centimeter scale) using phase-matched Brillouin interactions between two distinct optical cavity modes. Counterintuitively, we show that these macroscopic systems, with motional masses that are 1 million to 100 million times larger than those of microscale counterparts, offer a complementary path toward robust ground-state operation. We perform both optomechanically induced amplification/transparency measurements and demonstrate parametric instability of bulk phonon modes. This is an important step toward using these beam splitter and two-mode squeezing interactions within bulk acoustic systems for applications ranging from quantum memories and microwave-to-optical conversion to high-power laser oscillators.