Differential absorption ozone Lidar with 4H-SiC single-photon detectors

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED Applied Physics Letters Pub Date : 2024-11-18 DOI:10.1063/5.0232210

Xian-Song Zhao, Chao Yu, Chong Wang, Tianyi Li, Bo Liu, Hai Lu, Rong Zhang, Xiankang Dou, Jun Zhang, Jian-Wei Pan

引用次数: 0

Abstract

Differential absorption Lidar (DIAL) in the ultraviolet (UV) region is an effective approach for monitoring tropospheric ozone. 4H-SiC single-photon detectors (SPDs) are emergent devices for UV single-photon detection. Here, we demonstrate a 4H-SiC SPD-based ozone DIAL. We design and fabricate the 4H-SiC single-photon avalanche diode with a beveled mesa structure and optimized layer thickness. An active quenching circuit with a quenching time of 1.03 ns is developed to significantly mitigate the afterpulsing effect while enhancing the maximum count rate. After characterization, the SPD exhibits excellent performance with a photon detection efficiency of 16.6% at 266 nm, a dark count rate of 138 kcps, a maximum count rate of 13 Mcps, and an afterpulse probability of 2.7% at room temperature. Then, we apply two 4H-SiC SPDs in an ozone DIAL. The measured ozone concentrations at altitudes of 1–3.5 km agree well with the results of a commercial ozone DIAL. Our work provides an alternative solution for general UV Lidar applications.

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采用 4H-SiC 单光子探测器的差分吸收臭氧激光雷达

紫外线（UV）区域的差分吸收激光雷达（DIAL）是监测对流层臭氧的一种有效方法。4H-SiC 单光子探测器（SPD）是紫外单光子探测的新兴设备。在此，我们展示了基于 4H-SiC SPD 的臭氧 DIAL。我们设计和制造的 4H-SiC 单光子雪崩二极管具有斜面网格结构和优化的层厚度。我们还开发了淬火时间为 1.03 ns 的主动淬火电路，在提高最大计数率的同时显著减轻了余脉效应。经过表征，SPD 表现出卓越的性能，在 266 nm 波长下的光子检测效率为 16.6%，暗计数率为 138 kcps，最大计数率为 13 Mcps，室温下的后脉冲概率为 2.7%。然后，我们将两个 4H-SiC SPD 应用于臭氧 DIAL。在 1-3.5 千米高空测得的臭氧浓度与商用臭氧 DIAL 的结果非常吻合。我们的工作为一般紫外激光雷达应用提供了另一种解决方案。

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.