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Euler-modified pulley-type microring on lithium niobate platform |
| Wen-Hui Song(宋文慧)1,†, Dong-Jie Guo(郭东洁)1,†, Ran Yang(杨然)1, Jia-Chen Duan(端家晨)1, Zi-Shuo Gu(顾子硕)1, Ji Tang(汤济)1,2, Zhilin Ye(叶志霖)1,2, Xiao-Hui Tian(田晓慧)1,‡, Kunpeng Jia(贾琨鹏)1, Zhong Yan(严仲)1, Zhijun Yin(尹志军)2, Yan-Xiao Gong(龚彦晓)1, Zhenda Xie(谢臻达)1, Zhenlin Wang(王振林)1, and Shi-Ning Zhu(祝世宁)1 |
1 National Laboratory of Solid State Microstructures, School of Physics, School of Electronic Science and Engineering, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China;
2 NanZhi Institute of Advanced Optoelectronic Integration Technology Co., Ltd., Nanjing 210093, China;
(Received 18 April 2025;
revised manuscript received 14 May 2025;
accepted manuscript online 11 July 2025) |
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Abstract Microring resonators, as essential components of photonic integrated circuits, offer compact size, wavelength selectivity, and strong resonance effects, making them invaluable in optical computing, on-chip interconnects, and quantum photonics. The proposal of the pulley-type microring enhances the coupling strength, but also brings about issues such as mode mismatch and the excitation of higher-order modes. Here, a lithium niobate microring resonator coupled with a pulley bus waveguide based on modified Euler curves is proposed. This Euler-modified pulley bus minimizes mode mismatch at bending junctions, effectively suppressing higher-order mode excitation. The design achieves a high $Q$ factor (exceeding $10^5$) and strong coupling efficiency (83%) within a compact structure of 70 μm radius. Due to its simple structure and ease of fabrication, the Euler-modified pulley-type microring holds practical value for applications requiring high-quality microring resonators.
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Received: 18 April 2025
Revised: 14 May 2025
Accepted manuscript online: 11 July 2025
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PACS:
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42.82.-m
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(Integrated optics)
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42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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42.79.Gn
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(Optical waveguides and couplers)
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| Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2024YFB2808300), the National Natural Science Foundation of China (Grant Nos. 62293523, 62288101, 62305156, 92463304, 92463308, 12304421, and 12341403), Zhangjiang Laboratory (Grant No. ZJSP21A001), Program of Jiangsu Natural Science Foundation (Grant Nos. BK20230770 and BK20232033), and Guangdong Major Project of Basic and Applied Basic Research (Grant No. 2020B0301030009). |
Corresponding Authors:
Xiao-Hui Tian
E-mail: tianxiaohui@nju.edu.cn
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Cite this article:
Wen-Hui Song(宋文慧), Dong-Jie Guo(郭东洁), Ran Yang(杨然), Jia-Chen Duan(端家晨), Zi-Shuo Gu(顾子硕), Ji Tang(汤济), Zhilin Ye(叶志霖), Xiao-Hui Tian(田晓慧), Kunpeng Jia(贾琨鹏), Zhong Yan(严仲), Zhijun Yin(尹志军), Yan-Xiao Gong(龚彦晓), Zhenda Xie(谢臻达), Zhenlin Wang(王振林), and Shi-Ning Zhu(祝世宁) Euler-modified pulley-type microring on lithium niobate platform 2025 Chin. Phys. B 34 084205
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