Low-loss phononic integrated circuits based on a silicon nitride-lithium niobate platform
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911551348277248 |
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| author | Ji, Jun Thomas, Joseph G Xi, Zichen Liu, Ruxuan Fang, Kinson Qin, Yuan Beling, Andreas Yi, Xu Zhu, Yizheng Shao, Linbo |
| author_facet | Ji, Jun Thomas, Joseph G Xi, Zichen Liu, Ruxuan Fang, Kinson Qin, Yuan Beling, Andreas Yi, Xu Zhu, Yizheng Shao, Linbo |
| contents | Microwave-frequency acoustic waves in solids have emerged as a versatile platform for both classical and quantum applications. While phononic integrated devices and circuits are being developed on various material platforms, an ideal phononic integrated circuit (PnIC) platform should simultaneously support low-loss waveguide structures, high-quality-factor resonators, high-performance modulators, and efficient electromechanical transducers. Here, we establish a low-loss gigahertz-frequency PnIC platform based on patterned thin-film silicon nitride (SiN) on lithium niobate (LN) substrate. We develop low-loss PnIC building blocks including waveguides, directional couplers, and high-quality-factor (high-Q) ring resonators. As an application, we demonstrate a 1-GHz phononic oscillator based on a ring resonator, reaching a low phase noise of -159.0 dBc/Hz at a 100-kHz offset frequency. Our low-loss PnICs could meet the requirements in microwave acoustics, quantum phononics, and integrated hybrid systems combining phonons, photons, superconducting qubits, and solid-state defects. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_27711 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Low-loss phononic integrated circuits based on a silicon nitride-lithium niobate platform Ji, Jun Thomas, Joseph G Xi, Zichen Liu, Ruxuan Fang, Kinson Qin, Yuan Beling, Andreas Yi, Xu Zhu, Yizheng Shao, Linbo Applied Physics Signal Processing Microwave-frequency acoustic waves in solids have emerged as a versatile platform for both classical and quantum applications. While phononic integrated devices and circuits are being developed on various material platforms, an ideal phononic integrated circuit (PnIC) platform should simultaneously support low-loss waveguide structures, high-quality-factor resonators, high-performance modulators, and efficient electromechanical transducers. Here, we establish a low-loss gigahertz-frequency PnIC platform based on patterned thin-film silicon nitride (SiN) on lithium niobate (LN) substrate. We develop low-loss PnIC building blocks including waveguides, directional couplers, and high-quality-factor (high-Q) ring resonators. As an application, we demonstrate a 1-GHz phononic oscillator based on a ring resonator, reaching a low phase noise of -159.0 dBc/Hz at a 100-kHz offset frequency. Our low-loss PnICs could meet the requirements in microwave acoustics, quantum phononics, and integrated hybrid systems combining phonons, photons, superconducting qubits, and solid-state defects. |
| title | Low-loss phononic integrated circuits based on a silicon nitride-lithium niobate platform |
| topic | Applied Physics Signal Processing |
| url | https://arxiv.org/abs/2603.27711 |