Qin Haoye, Yin Yiheng, Ding Ming
School of Instrumentation and Opto-Electronics Engineering, Beihang University, Beijing 100191, China.
School of Microelectronics, Beihang University, Beijing 100191, China.
ACS Omega. 2021 Feb 13;6(8):5463-5470. doi: 10.1021/acsomega.0c05673. eCollection 2021 Mar 2.
Synthetic dimensions and anti-parity-time (anti-PT) symmetry have been recently proposed and experimentally demonstrated in a single optical resonator. Here, we present the effect of the rotation-induced frequency shift in a synthetic anti-PT symmetric resonator, which enables the realization of a directional rotation sensor with improved sensitivity at an exceptional point (EP) and transparency assisted optical nonreciprocity (TAON) in the symmetry-broken region. The orthogonal rotation of this system results in the direction-independent frequency shift and maintenance of the EP condition even with rotation. Tunable transparency at the EP can thus be fulfilled. Hopefully, the proposed mechanisms will contribute to the development of high-precision rotation sensors and all-optical isolators and make the study of the synthetic anti-PT symmetric EP with rotation possible.
合成维度和反宇称时间（anti-PT）对称性最近已被提出并在单个光学谐振器中得到实验证明。在此，我们展示了合成反PT对称谐振器中旋转诱导频移的效应，这使得在奇异点（EP）处能够实现具有更高灵敏度的定向旋转传感器，并在对称破缺区域实现透明辅助光学非互易性（TAON）。该系统的正交旋转导致与方向无关的频移，并且即使在旋转时也能维持EP条件。因此，可以实现EP处的可调透明度。有望所提出的机制将有助于高精度旋转传感器和全光隔离器的发展，并使对具有旋转的合成反PT对称EP的研究成为可能。
