Cavity-Enhanced Acousto-Optic Modulators on Polymer-Loaded Lithium Niobate Integrated Platform

IF 6.5 1区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Photonics Pub Date : 2025-03-20 DOI:10.1021/acsphotonics.4c02302

Zhi Jiang, Danyang Yao, Yu Gao, Xu Ran, Jianguo Wang, Xuetao Gan, Yan Liu, Yue Hao, Genquan Han

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Abstract

On-chip acousto-optic (AO) modulation represents a significant advancement in the development of highly integrated information processing systems. However, conventional photonic devices face substantial challenges in achieving efficient conversion due to the limited overlap between acoustic waves and optical waves. In this study, we address this limitation by demonstrating an enhanced conversion effect of photonic crystal nanobeam cavity (PCNBC) in AO modulation on a polymer-loaded lithium niobate integrated platform. Attributed to the high quality factor to mode volume ratio (Q/V) and optimal light-sound overlap within the nanocavity, PCNBC-based AO modulator exhibits a significantly enhanced extinction ratio of 38 dB with a threshold RF power below −50 dBm, which is two orders of magnitude lower than that based on microring resonator (MRR). In addition, robust digital amplitude shift keying modulations were performed using selected RF and optical channels of the PCNBC-enhanced AO modulators. These findings validate the compelling properties of the PCNBC photonic platform, establishing it as a promising candidate for on-chip integrated microwave photonics, optical transceivers, and computing applications.

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片上声光（AO）调制是高度集成信息处理系统发展的一大进步。然而，由于声波和光波之间的重叠有限，传统光子器件在实现高效转换方面面临巨大挑战。在本研究中，我们在聚合物负载铌酸锂集成平台上展示了光子晶体纳米束腔（PCNBC）在 AO 调制中的增强转换效果，从而解决了这一限制。由于纳米腔内的高品质因数与模式体积比（Q/V）和最佳光声重叠，基于 PCNBC 的 AO 调制器的消光比显著提高了 38 dB，阈值射频功率低于 -50 dBm，比基于微波谐振器（MRR）的调制器低两个数量级。此外，还利用 PCNBC 增强型 AO 调制器的选定射频和光通道进行了稳健的数字移幅键控调制。这些发现验证了 PCNBC 光子平台的强大性能，使其成为片上集成微波光子学、光收发器和计算应用的理想候选器件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Photonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

11.90

自引率

5.70%

发文量

438

审稿时长

2.3 months

期刊介绍： Published as soon as accepted and summarized in monthly issues, ACS Photonics will publish Research Articles, Letters, Perspectives, and Reviews, to encompass the full scope of published research in this field.