Laboratory for Solid State Physics, ETH Zürich, 8093 Zürich, Switzerland.
Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark.
Phys Rev Lett. 2022 Mar 4;128(9):094301. doi: 10.1103/PhysRevLett.128.094301.
We demonstrate parametric coupling between two modes of a silicon nitride membrane. We achieve the coupling by applying an oscillating voltage to a sharp metal tip that approaches the membrane surface to within a few 100 nm. When the voltage oscillation frequency is equal to the mode frequency difference, the modes exchange energy periodically and faster than their free energy decay rate. This flexible method can potentially be useful for rapid state control and transfer between modes, and is an important step toward parametric spin sensing experiments with membrane resonators.
我们演示了氮化硅膜中两个模式之间的参数耦合。我们通过向一个接近膜表面的几 100nm 的尖锐金属尖端施加一个振荡电压来实现耦合。当电压振荡频率等于模式频率差时，模式会周期性地交换能量，速度比它们的自由能衰减率还快。这种灵活的方法可能对模式之间的快速状态控制和转移有用，也是朝着使用膜谐振器进行参数自旋传感实验迈出的重要一步。
