arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2406.19620physics.opticsphysics.app-ph
收藏

用于高效太赫兹-光调制与太赫兹产生的单片铌酸锂光子芯片

Monolithic lithium niobate photonic chip for efficient terahertz-optic modulation and terahertz generation

Yiwen Zhang, Jingwei Yang, Zhaoxi Chen, Hanke Feng, Sha Zhu, Kam-Man Shum, Chi Hou Chan, Cheng Wang

阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

AI总结：

本文提出一种石英衬底薄膜铌酸锂单片光子芯片，利用二阶非线性实现高效太赫兹-光调制与高达500 GHz的连续太赫兹波产生，显著降低调制功耗并提升产生效率，为紧凑高效太赫兹系统奠定基础。

摘要：

太赫兹（THz）频段位于微波与红外频率之间，为先进成像、传感、通信和光谱学应用提供了前所未有的机遇。与微波光子学类似，太赫兹光子学是一种通过光学方法应对太赫兹技术关键挑战的有前景的解决方案。尽管潜力巨大，但在有效实现太赫兹信号与光域接口方面仍存在关键技术挑战，尤其是太赫兹-光调制和太赫兹波的光学产生。在此，我们利用一种单片集成光子芯片来应对这些挑战，该芯片旨在支持太赫兹波与光波之间的高效双向相互作用。借助石英衬底上薄膜铌酸锂平台中显著的二阶光学非线性以及强大的光场和太赫兹场约束能力，该芯片支持高效的太赫兹-光调制以及高达500 GHz的连续太赫兹波产生。该太赫兹-光调制器在500 GHz下的射频（RF）半波电压为8V，与此前工作相比，调制功耗降低了一个数量级以上。在500 GHz处测得的连续波太赫兹产生效率为4.8*10-6 /W，也标志着相较于现有基于铌酸锂的可调谐太赫兹产生器件实现了十倍提升。我们进一步利用光学太赫兹产生过程的相干特性以及成熟的光调制技术，实现了频率高达35 GHz的高速电-太赫兹调制。该芯片级太赫兹-光子平台为更紧凑、高效且成本更低的太赫兹系统铺平了道路，在太赫兹通信、遥感与光谱学领域具有潜在应用。

英文摘要：

The terahertz (THz) frequency range, bridging the gap between microwave and infrared frequencies, presents unparalleled opportunities for advanced imaging, sensing, communications, and spectroscopy applications. Terahertz photonics, in analogy with microwave photonics, is a promising solution to address the critical challenges in THz technologies through optical methods. Despite its vast potential, key technical challenges remain in effectively interfacing THz signals with the optical domain, especially THz-optic modulation and optical generation of THz waves. Here, we address these challenges using a monolithic integrated photonic chip designed to support efficient bidirectional interaction between THz and optical waves. Leveraging the significant second-order optical nonlinearity and strong optical and THz confinement in a thin-film lithium niobate on quartz platform, the chip supports both efficient THz-optic modulation and continuous THz wave generation at up to 500 GHz. The THz-optic modulator features a radio frequency (RF) half-wave voltage of 8V at 500 GHz, representing more than an order of magnitude reduction in modulation power consumption from previous works. The measured continuous wave THz generation efficiency of 4.8*10-6 /W at 500 GHz also marks a tenfold improvement over existing tunable THz generation devices based on lithium niobate. We further leverage the coherent nature of the optical THz generation process and mature optical modulation techniques to realize high-speed electro-THz modulation at frequencies up to 35 GHz. The chip-scale THz-photonic platform paves the way for more compact, efficient, and cost-effective THz systems with potential applications in THz communications, remote sensing, and spectroscopy.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑