论文标题
基于特殊点的方向敏感的光学加速度计
Orientation-sensed Optomechanical Accelerometers based on Exceptional Points
论文作者
论文摘要
我们提出了一种光力学设计，该设计由以特殊点脱落（EPD）调整的平价对称多层结构组成，其可调节层与微机械弹簧耦合。该层对加速度的偏差$α$，导致平方根的共振吸引$ΔΩ\equivΩ-equivΩ-ω__{epd} \ propto \sqrtα$ - 因此，大大增强了超小加速度$α\ ll1 $的探针。我们的设计是可扩展的，原则上可以支持具有敏感性的较高$ n $ order EPDS $ΔΩ\ propto \ sqrt [n]α$。它还为新一代的片上超敏加速度计和激光仪提供了途径。
We propose an optomechanical design, consisting of a parity-time symmetric multilayer structure tuned at exceptional-point degeneracy (EPD), with an adjustable layer that is coupled to micromechanical springs. The deflections of this layer in response to accelerations $α$, lead to square-root resonance detuning $Δω\equivω-ω_{EPD}\propto \sqrtα$ - thus dramatically enhancing the probe of ultra-small accelerations $α\ll1$. Our design is scalable and can, in principle, support higher $N$ order EPDs with sensitivity $Δω\propto\sqrt[n]α$. It also provides a pathway towards a new generation of on-chip hypersensitive accelerometers and vibrometers.
