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

• URL: http://arxiv.org/abs/2107.10421v2
• Date: Wed, 2 Feb 2022 04:38:54 GMT
• Title: Topological optomechanical amplifier with synthetic $\mathcal{PT}$-symmetry
• Authors: Jian-Qi Zhang, Jing-Xin Liu, Hui-Lai Zhang, Zhi-Rui Gong, Shuo Zhang, Lei-Lei Yan, Shi-Lei Su, Hui Jing, and Mang Feng
• Abstract summary: We find that harnessing the Stokes process in such a system can lead to the emergence of exceptional point. Our synthetic $mathcalPT$-symmetric optomechanics works as a topological optomechanical amplifier.
• Score: 8.22643506114197
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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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