论文标题
基于合成磁性特殊点的传感器灵敏度
Sensor sensitivity based on synthetic magnetism exceptional point
论文作者
论文摘要
提出了基于特殊点（EPS）的有效质量传感器，在合成磁性要求下进行了设计。基准系统由一个机电（光力学）系统组成，该系统正在驱动两个机械谐振器，这些机械谐振器通过相关的声子跳动机械耦合。一旦EPS与$ \fracπ{2}（2n +1）$相匹配，该阶段就会诱导EPS系列。对于系统的任何扰动，不再满足相匹配的条件，这会提高epigeneracies，从而导致频率分裂，该频率缩放为扰动强度的平方根，从而导致巨大的灵敏度因子增强。由于EPS集，我们的建议允许多种传感方案，并且比其反对称传感器对应物更好。这项工作阐明了可用于大规模感应目的的新平台，在纳米颗粒或污染物检测中打开新的机会以及水处理。
An efficient mass sensor based on exceptional points (EPs), engineered under synthetic magnetism requirement, is proposed. The benchmark system consists of an electromechanical (optomechanical) system where an electric (optical) field is driving two mechanical resonators which are mechanically coupled through a phase-dependent phonon-hopping. This phase induces series of EPs once it matches the condition of $\fracπ{2}(2n +1)$. For any perturbation of the system, the phase-matched condition is no longer satisfied and this lifts the EP-degeneracies leading to a frequency splitting that scales as the square root of the perturbation strength, resulting in a giant sensitivity-factor enhancement. Owing to the set of EPs, our proposal allows multiple sensing scheme and performs better than its anti-PT-symmetric sensor counterpart. This work sheds light on new platforms that can be used for mass sensing purposes, opening up new opportunities in nanoparticles or pollutants detection, and to water treatment.
