Suspension-Free Integrated Cavity Brillouin Optomechanics on a Chip
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912665938427904 |
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| author | Yang, Yuan-Hao Wang, Jia-Qi Zhu, Zheng-Xu Xu, Xin-Biao Li, Ming Lu, Juanjuan Guo, Guang-Can Sun, Luyan Zou, Chang-Ling |
| author_facet | Yang, Yuan-Hao Wang, Jia-Qi Zhu, Zheng-Xu Xu, Xin-Biao Li, Ming Lu, Juanjuan Guo, Guang-Can Sun, Luyan Zou, Chang-Ling |
| contents | Cavity optomechanical systems enable coherent photon-phonon interactions essential for quantum technologies, yet high-performance devices have been limited to suspended structures. Here, we overcome this limitation by demonstrating cavity Brillouin optomechanics in a suspension-free racetrack microring resonator on a lithium-niobate-on-sapphire chip, a platform that merits high stability and scalability. We demonstrate coherent coupling between telecom-band optical modes and a 9.6-GHz phonon mode, achieving a maximum cooperativity of $0.41$ and a phonon quality-factor-frequency product of $10^{13}\,\mathrm{Hz}$. The momentum-matching condition inherent to traveling-wave Brillouin interactions establishes a one-to-one mapping between optical wavelength and phonon frequency, enabling multi-channel parallel operations across nearly $300\,\mathrm{MHz}$ in phonon frequency and $40\,\mathrm{nm}$ in optical wavelength. Our suspension-free architecture provides a coherent photon-phonon interface compatible with wafer-scale integration, opening pathways toward hybrid quantum circuits that unite photonic, phononic, and superconducting components on a single chip. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_20463 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Suspension-Free Integrated Cavity Brillouin Optomechanics on a Chip Yang, Yuan-Hao Wang, Jia-Qi Zhu, Zheng-Xu Xu, Xin-Biao Li, Ming Lu, Juanjuan Guo, Guang-Can Sun, Luyan Zou, Chang-Ling Optics Cavity optomechanical systems enable coherent photon-phonon interactions essential for quantum technologies, yet high-performance devices have been limited to suspended structures. Here, we overcome this limitation by demonstrating cavity Brillouin optomechanics in a suspension-free racetrack microring resonator on a lithium-niobate-on-sapphire chip, a platform that merits high stability and scalability. We demonstrate coherent coupling between telecom-band optical modes and a 9.6-GHz phonon mode, achieving a maximum cooperativity of $0.41$ and a phonon quality-factor-frequency product of $10^{13}\,\mathrm{Hz}$. The momentum-matching condition inherent to traveling-wave Brillouin interactions establishes a one-to-one mapping between optical wavelength and phonon frequency, enabling multi-channel parallel operations across nearly $300\,\mathrm{MHz}$ in phonon frequency and $40\,\mathrm{nm}$ in optical wavelength. Our suspension-free architecture provides a coherent photon-phonon interface compatible with wafer-scale integration, opening pathways toward hybrid quantum circuits that unite photonic, phononic, and superconducting components on a single chip. |
| title | Suspension-Free Integrated Cavity Brillouin Optomechanics on a Chip |
| topic | Optics |
| url | https://arxiv.org/abs/2510.20463 |