近日，郑州轻工业大学Hui Jing团队研究了特殊表面上的光机诱导透明度。相关论文于2025年4月17日发表在《物理评论A》杂志上。

异常点（EP）是非厄米系统中的奇点，其中传输谱在相变点处表现出显著的变化。研究组提出了一种实用的方法来研究非厄米腔光机系统中的光机诱导透明光谱。通过利用波导结构设计中得出的两种特殊表面（ES），研究了这些ES上不同EP处的传输光谱和快慢光现象，并确定了对参数波动具有鲁棒性的ES保护传输光谱。

因此，当发生相变时，该系统在EP处的透射和快慢光行为与非EP处的完全相反。与之前仅关注孤立EP的研究不同，该方法能够探索不同EP的系统特性，为实验设计提供了更大的灵活性。

附：英文原文

Title: Optomechanically induced transparency on exceptional surfaces

Author: Yang Pan, H.-L. Zhang, Y.-F. Jiao, Y. Wang, D.-Y. Wang, S.-L. Su, Hui Jing

Issue&Volume: 2025/04/17

Abstract: Exceptional points (EPs) are singularities in non-Hermitian systems where the transmission spectrum exhibits significant variation at the phase transition point. Here, we propose a practical method for investigating the optomechanically induced transparency spectrum in a non-Hermitian cavity optomechanical system. By exploiting two kinds of exceptional surfaces (ESs) derived from the design of the waveguide structure, we study the transmission spectra and fast-slow light phenomena at various EPs on these ESs, and we identify ES-protected transmission spectra that are robust to parameter fluctuations. Consequently, the system exhibits a complete reversal of both transmission and fast-slow light behavior at EPs compared with those at non-EPs when the phase transition occurs. Unlike previous studies that focus solely on an isolated EP, our approach enables the exploration of system characteristics with different EPs, providing greater flexibility for experimental design.

DOI: 10.1103/PhysRevA.111.043521

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.111.043521