Dielectric control of high Q nanomechanical resonators (A07)

我们探索由强预应力材料制造的纳米机械谐振器，提供高机械质量因子。除了已建立的非晶氮化硅外，我们将重点关注晶体InGaP谐振器，其中应抑制结构材料缺陷的耗散。将开发基于多电极布局的精细介电控制方案，以实现可调谐耦合并诱导双稳性。最后，研究了两种耦合纳米力学模式在大振幅振动下的非线性动力学，研究了自振荡、同步、参数共振和注入锁紧等现象。

We explore nanomechanical resonators fabricated from strongly pre-stressed material offering a high mechanical qual-ity factor. Besides the established amorphous silicon nitride, we will focus on crystalline InGaP resonators in which dissipation from configurational material defects should be suppressed. Refined dielectric control schemes based multi-electrode layouts will be developed to implement tunable coupling and to induce bistability. Finally, the nonlinear dy-namics of two coupled nanomechanical modes under large amplitude vibration will be studied to investigate phenomena such as self-oscillation, synchronization, parametric resonance and injection locking.