Topological optomechanical amplifier with synthetic $\mathcal{PT}$-symmetry

分类： 光学 >> 量子光学 提交时间： 2023-02-19

Jian-Qi Zhang Jing-Xin Liu Hui-Lai Zhang Zhi-Rui Gong Shuo Zhang Lei-Lei Yan Shi-Lei Su Hui Jing Mang Feng

摘要： We propose how to achieve synthetic $\mathcal{PT}$ symmetry in optomechanics without using any active medium. We find that harnessing the Stokes process in such a system can lead to the emergence of exceptional point (EP), i.e., the coalescing of both the eigenvalues and the eigenvectors of the system. By encircling the EP, both non-reciprocal optical amplification and chiral mode switching can be achieved. As a result, our synthetic $\mathcal{PT}$-symmetric optomechanics works as a topological optomechanical amplifier. This provides a surprisingly simplified route to realize $\mathcal{PT}$-symmetric optomechanics, indicating that a wide range of EP devices can be created and utilized for various applications such as topological optical engineering and nanomechanical processing or sensing.

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