具有多种偏置结构的低电压高带宽表面照明三端锗硅APD

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-01-14 DOI:10.1063/5.0239942

Huan Qu, Xuetong Li, Xiaobin Liu, Weipeng Wang, Yingzhi Li, Baisong Chen, Heming Hu, Zihao Zhi, Ziming Wang, Jie Li, Guoqiang Lo, Lei Wang, Quanxin Na, Xueyan Li, Xiaolong Hu, Qijie Xie, Junfeng Song

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引用次数: 0

摘要

在这项工作中，提出了一种用于锗硅雪崩光电二极管（APD）结构的调节电压偏置配置。该设计采用扩展的n电荷层来降低击穿电压，并优化吸收区厚度以减少电子传递时间。通过在吸收区和雪崩区分别应用三个电极分别调制电场，可以实现低雪崩击穿电压（−8.1 V）和高带宽（20.4 GHz）的表面照明探测器。同时，微弱光检测的灵敏度提高到−45 dBm。当偏置电压为−13.5 V时，APD在1550 nm处的响应度为60.76 A/W。低电压和改进的带宽可以满足弱光检测和其他需要这种灵敏度的应用的要求。

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Low voltage and high bandwidth surface-illuminated three-terminal Ge-on-Si APD with multiple biasing configurations

In this work, a regulated-voltage biasing configuration is proposed for the Ge-on-Si avalanche photodiode (APD) structure. This design incorporates an extended n-charge layer to decrease the breakdown voltage and optimizes the absorption region thickness to reduce the electron transit time. By applying three electrodes to individually modulate the electric fields in the absorption and avalanche region, respectively, both of low avalanche breakdown voltage (−8.1 V) and high bandwidth (20.4 GHz) of the surface-illuminated detector can be achieved. Meanwhile, the sensitivity of weak light detection is improved to −45 dBm. The responsivity of the APD is 60.76 A/W at 1550 nm when the voltage is biased at −13.5 V. The low voltage and improved bandwidth can meet the requirements for weak light detection and other applications demanding such sensitivity.

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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.