论文标题
在光学微腔内具有鲁棒性的表面增强旋转感应
Exceptional surface-enhanced Rotation Sensing with Robustness in an optical microcavity
论文作者
论文摘要
特殊点(EPS)是非热汉顿人的特殊奇异性。在EP中,两个或多个特征值和相应的特征状态结合。最近,广泛研究了EP附近的基于EP的光学陀螺仪,以改善对旋转的反应。但是,基于EP的系统引起的本征态空间中高度的维度是对更外部扰动的敏感性,即EPS的巨大响应需要严格的实施条件。为了解决这个问题,提出了一种新的非热结构,该结构实现了一个由嵌入高维参数空间中的许多EP构建的特殊表面(EP表面)。对于孤立的EPS,非炎症EP表面提供了额外的自由度,以允许不想要的扰动(例如制造误差)沿EP表面移动,而EP表面对应于鲁棒性。另一方面,与传统的SAGNAC效应旋转检测相比,旋转将迫使系统远离这些EPS,从而获得三个数量级的灵敏度增强。 EP表面系统具有结合鲁棒性与旋转灵敏度增强的潜力。
Exceptional points (EPs) are special singularities of non-Hermitian Hamiltonians. At an EP, two or more eigenvalues and the corresponding eigenstates coalesce. Recently, EP-based optical gyroscope near an EP was extensively investigated to improve the response to rotation. However, the highly resultant dimensionality in the eigenstate space causing from the EP-based system is sensitivity to more external perturbations, that is, the great response at EPs requires strict implementation conditions. To solve this problem, a new non-Hermitian structure was proposed that realizes an exceptional surface (EP surface) constructed of numerous EPs embedded in a high-dimensional parameter space. With respect to the isolated EPs, non-Hermitian EP surface provides additional degrees of freedom to permit the undesired perturbations (such as fabrication errors) shifts along the EP surface which corresponds to the robustness. On the other hand, the rotation will force the system away from these EPs obtaining a sensitivity enhancement of three orders of magnitude, compared to the traditional Sagnac effect rotation detecting. The EP surface system has a potential to combine robustness with enhanced sensitivity of the rotation.