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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.01940 |
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| _version_ | 1866914456900993024 |
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| author | Xu, Xin-Biao Zhu, Zheng-Xu Yang, Yuan-Hao Wang, Jia-Qi Zeng, Yu Zou, Jia-Hua Lu, Juanjuan Zhang, Yan-Lei Wang, Weiting Guo, Guang-Can Sun, Luyan Zou, Chang-Ling |
| author_facet | Xu, Xin-Biao Zhu, Zheng-Xu Yang, Yuan-Hao Wang, Jia-Qi Zeng, Yu Zou, Jia-Hua Lu, Juanjuan Zhang, Yan-Lei Wang, Weiting Guo, Guang-Can Sun, Luyan Zou, Chang-Ling |
| contents | Breaking time-reversal symmetry in integrated photonics without magnetic fields remains a fundamental challenge. We demonstrate phonon-induced non-reciprocity through direct lifting of forward-backward mode degeneracy in microring resonators. Coherent acousto-optic coupling generates differential AC Stark shifts between counter-propagating fundamental optical modes, eliminating the need for intermodal conversion or complex photonic structures. Simple microwave excitation of integrated piezoelectric transducers provides dynamic control of non-reciprocal response, with experimentally demonstrated mode splitting exceeding twice the optical linewidth. The linear relationship between the splitting and acoustic power enables real-time reconfigurability across a wide range of optical wavelengths. This mechanism requires only simple microring resonators and fundamental optical modes, transforming non-reciprocity from a specialized technique requiring careful modal engineering to a universal, electrically-controlled functionality. Our approach establishes a new paradigm for magnetic-free optical isolation and dynamic topological photonics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_01940 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic-free optical mode degeneracy lifting in lithium niobate microring resonators Xu, Xin-Biao Zhu, Zheng-Xu Yang, Yuan-Hao Wang, Jia-Qi Zeng, Yu Zou, Jia-Hua Lu, Juanjuan Zhang, Yan-Lei Wang, Weiting Guo, Guang-Can Sun, Luyan Zou, Chang-Ling Optics Breaking time-reversal symmetry in integrated photonics without magnetic fields remains a fundamental challenge. We demonstrate phonon-induced non-reciprocity through direct lifting of forward-backward mode degeneracy in microring resonators. Coherent acousto-optic coupling generates differential AC Stark shifts between counter-propagating fundamental optical modes, eliminating the need for intermodal conversion or complex photonic structures. Simple microwave excitation of integrated piezoelectric transducers provides dynamic control of non-reciprocal response, with experimentally demonstrated mode splitting exceeding twice the optical linewidth. The linear relationship between the splitting and acoustic power enables real-time reconfigurability across a wide range of optical wavelengths. This mechanism requires only simple microring resonators and fundamental optical modes, transforming non-reciprocity from a specialized technique requiring careful modal engineering to a universal, electrically-controlled functionality. Our approach establishes a new paradigm for magnetic-free optical isolation and dynamic topological photonics. |
| title | Magnetic-free optical mode degeneracy lifting in lithium niobate microring resonators |
| topic | Optics |
| url | https://arxiv.org/abs/2509.01940 |