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arXiv · 2510.07598

High-Q and Compact Fabry-Perot Microresonators on Thin-Film Lithium Niobate

Likai Yang·Chunzhen Li·Jiacheng Xie·Hong X. Tang
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Abstract

Thin-film lithium niobate (TFLN) has played a pivotal role in the advancement of integrated photonics, by supporting a diverse range of applications including nonlinear optics, electro-optics, and piezo-optomechanics. The effective realization and enhancement of these interactions rely heavily on the implementation of high quality photonic microresonators. The pursuit of novel resonator architectures with optimized properties thus represents a central research area in TFLN photonics. In this work, we design and fabricate TFLN Fabry-Perot microresonators, by placing a straight section of waveguide between a pair of tapered photonic crystal mirrors. The resonator features a high quality factor of 600k at 1530 nm and a compact length of 100 um. The functionality of the device is further demonstrated by integrating on-chip electrodes for high-frequency piezo-optomechanical modulation. Our device can serve as an appealing candidate for developing high-performance photonic components on the TFLN platform.

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Likai Yang, Chunzhen Li, Jiacheng Xie, Hong X. Tang. 2025-10-08. High-Q and Compact Fabry-Perot Microresonators on Thin-Film Lithium Niobate. https://arxiv.org/abs/2510.07598

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