Nanophotonic MOS Solar-Blind Avalanche UV Detectors

纳米光子 MOS 日盲雪崩紫外线探测器

• 批准号: 1231701
• 负责人: Jifeng Liu
• 金额: $ 36.62万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1231701&HistoricalAwards=false
• 关键词: Nanophotonic; MOS; Solar; Blind; Avalanche

The objective of this research is to invent a new device structure of solar-blind ultraviolet detectors for a broad range of applications, from homeland security to environmental monitoring. Instead of relying on semiconductors with wide band gaps 4 eV, the approach is based on a novel nanophotonic metal-oxide-semiconductor structure coupled with avalanche gain in Si. Compared to wide band gap semiconductor devices, this device structure offers much easier materials deposition, device fabrication, and integration with Si read-out circuits.The intellectual merits of this research are: (1) The proposed device structure sets a new paradigm for solid-state photodetectors by using metal instead of semiconductor as an active photon absorption medium; (2) The investigations on hot electron ballistic transport in metals will explore a new territory applicable to other devices such as high-efficiency solar cells; and (3) Engineering the electronic structures of metal alloys for active metallic optoelectronic devices extends the realm of band engineering beyond semiconductors. The project makes a broader impact by providing high performance, inexpensive solar-blind ultraviolet detectors for a broad range of applications, including early missile warning, ozone-hole monitoring, chemical/biological sensing, and secure short-range communications. An example is large-scale mapping of ultraviolet radiation associated with ozone depletion, where data can be collected by groups of K-12 students in their local region. Such activities get them involved into scientific research and raise their awareness of environmental sustainability. The nanophotonic solar-blind ultraviolet detectors can also equip Arctic researchers to monitor ozone holes in the Arctic region.

这项研究的目的是发明一种新的日盲紫外线探测器装置结构，其应用范围广泛，从国土安全到环境监测。该方法不是依赖于宽带隙 4 eV 的半导体，而是基于一种新颖的纳米光子金属氧化物半导体结构以及硅中的雪崩增益。与宽带隙半导体器件相比，这种器件结构提供了更容易的材料沉积、器件制造以及与 Si 读出电路的集成。这项研究的智力优点是：（1）所提出的器件结构为固体半导体器件树立了新的范例。 -使用金属代替半导体作为活性光子吸收介质的状态光电探测器； （2）金属中热电子弹道输运的研究将为高效太阳能电池等其他器件探索新的领域； (3) 设计用于有源金属光电器件的金属合金的电子结构，将能带工程的领域扩展到半导体之外。该项目通过提供高性能、廉价的日盲紫外线探测器来产生更广泛的影响，其应用范围广泛，包括早期导弹预警、臭氧空洞监测、化学/生物传感和安全短程通信。一个例子是与臭氧消耗相关的紫外线辐射的大规模绘图，其中数据可以由当地的 K-12 学生小组收集。这些活动让他们参与科学研究并提高他们对环境可持续性的认识。纳米光子日盲紫外线探测器还可以装备北极研究人员监测北极地区的臭氧空洞。

项目成果

An Efficient Nanophotonic Hot Electron Solar-Blind UV Detector

高效的纳米光子热电子日盲紫外探测器

• DOI: 10.1021/acsphotonics.8b01055
• 发表时间: 2018-09-28
• 期刊: ACS Photonics
• 影响因子: 7
• 作者: Zhiyuan Wang;Xiaoxin Wang;Jifeng Liu
• 通讯作者: Jifeng Liu