Nanomembrane blazed grating coupler for vertical fiber-chip interface

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-09-09 DOI:10.1063/5.0223504

Xingyu Liu, Rongxiang Guo, Shujiao Zhang, Zunyue Zhang, Jiaqi Wang, Tiegen Liu, Zhenzhou Cheng

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引用次数: 0

Abstract

Mid-infrared (mid-IR) silicon photonics holds promising applications for the Internet of Things, LiDAR, and optical communications. Perfectly vertical grating couplers are superior mid-IR light coupling techniques, featuring ease of packaging, positioning flexibility, and mass production scalability. However, high-efficiency mid-IR perfectly vertical grating couplers still need to be developed due to the difficulties of efficiently engineering grating directionality and diffracted light at long wavelengths. In this paper, we present a mid-IR nanomembrane blazed grating coupler with segmented structure engineering based on a standard multi-project wafer service. The method is based on exploring the improvement of the grating directionality and modal overlap by combining grating units with different structures and thicknesses. Experimental results showcase a maximum coupling efficiency of −4.4 dB with a 3-dB bandwidth of ∼70 nm at 2100 nm wavelengths. This study contributes to the strategy of designing exceptional grating couplers with multiple functional units, paving the way for developing mid-IR photonic integrated circuits based on silicon photonics foundries.

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用于垂直光纤芯片接口的纳米膜炽热光栅耦合器

中红外（mid-IR）硅光子技术在物联网、激光雷达和光通信领域有着广阔的应用前景。完全垂直光栅耦合器是一种优越的中红外光耦合技术，具有易于封装、定位灵活和可大规模生产等特点。然而，由于难以有效地设计光栅方向性和长波长衍射光，高效中红外完全垂直光栅耦合器仍有待开发。本文介绍了一种基于标准多项目晶片服务的分段结构工程中红外纳米膜炽热光栅耦合器。该方法的基础是通过组合不同结构和厚度的光栅单元，探索如何改善光栅的方向性和模态重叠。实验结果表明，在 2100 nm 波长处，最大耦合效率为 -4.4 dB，3-dB 带宽为 70 nm。这项研究为设计具有多种功能单元的特殊光栅耦合器的战略做出了贡献，为开发基于硅光子代工厂的中红外光子集成电路铺平了道路。

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

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.