On-chip beam steering in gradient-index waveguide arrays

Yunfei Niu; Qingyang Du; Shaoliang Yu; Tao Chu

doi:10.1117/12.2687110

28 November 2023 On-chip beam steering in gradient-index waveguide arrays

Yunfei Niu, Qingyang Du, Shaoliang Yu, Tao Chu

Author Affiliations +

Proceedings Volume 12764, Optoelectronic Devices and Integration XII; 127640S (2023) https://doi.org/10.1117/12.2687110
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

The ability to manipulate light propagation is crucial for the development of optical communication and information processing systems. Photonic integrated circuits have gained significant attention due to their ability to integrate a large volume of components and operate at high speeds, making them ideal for handling the increasing data capacity and rate. In this study, we proposed and experimentally demonstrated a novel method for beam steering using waveguide arrays with specific distributed spacing profiles. By analyzing the diffraction and coherence properties, we discovered that a single waveguide array can perform imaging and phase transformation functions, which are typically achieved using optical lenses. To further enhance this capability, we fabricated corresponding devices on a silicon nitride waveguide platform and investigated the light propagation process through the arrayed waveguide. We successfully achieved various forms of beam steering, including focusing, expansion, and collimation. This beam control method holds great potential for on-chip optical routing, ranging, sensing, and other applications. It offers high integration density and scalability, making it a promising solution for the development of advanced optical systems.

Citation Download Citation

Yunfei Niu, Qingyang Du, Shaoliang Yu, and Tao Chu "On-chip beam steering in gradient-index waveguide arrays", Proc. SPIE 12764, Optoelectronic Devices and Integration XII, 127640S (28 November 2023); https://doi.org/10.1117/12.2687110

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KEYWORDS

Waveguides

Diffraction

Beam steering

Light wave propagation

Silicon nitride

Quantum systems

Scanning electron microscopy

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