Terahertz Spectroscopy of Semiconductor Nanowires

半导体纳米线的太赫兹光谱

• 批准号: EP/H016368/1
• 负责人: Michael Johnston
• 金额: $ 96.21万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH016368%2F1
• 关键词: Terahertz; Spectroscopy; Semiconductor; Nanowires

Nanostructures such as carbon nanotubes and ZnO nano-particles are already being used in commercialproducts such as tyres and sunscreens. However, despite progress in understanding the mechanical andoptical properties of nano-materials we are still at the dawn of the fields of nano-optoelectronics andnano-photonics. Advances in understanding the fundamental materials science of these nano-materials todaywill therefore have a major impact on a wide range of commercial products over the next 30 years. One of thedifficulties with developing nano-optoelectronic components is the complexity of measuring their electricalproperties. Traditionally, new materials and devices have been tested via electrical transport measurements.Unfortunately, it is extremely difficult to make electrical contacts on a 30nm diameter nano-wire or anano-particle. Indeed even if the contacts are made it is then difficult to separate the properties of thenano-material from those of the contact. Additionally, such measurements are plagued by reproducibilityproblems. Thus there is a pressing need for techniques that can quickly and reliably extract the electricalproperties of nano-structured materials. The availability of such techniques would greatly accelerate thedevelopment of new materials and allow devices based on these materials to be brought to the market sooner.We propose to solve these problems by applying the technique of optical pump terahertz probe spectroscopy(OPTPS) to semiconductor nano-wires, and by developing refined models to extract the most importantdevice-specific electrical properties from the measured data. The knowledge we gain will help us develop newoptoelectronic devices based on semiconductor nano-wires.

碳纳米管和氧化锌纳米粒子等纳米结构已被用于轮胎和防晒霜等商业产品中。然而，尽管在理解纳米材料的机械和光学特性方面取得了进展，但我们仍处于纳米光电子学和纳米光子学领域的黎明。因此，当今对这些纳米材料的基础材料科学的理解的进步将对未来 30 年的各种商业产品产生重大影响。开发纳米光电元件的困难之一是测量其电性能的复杂性。传统上，新材料和设备是通过电传输测量来测试的。不幸的是，在 30nm 直径的纳米线或纳米颗粒上建立电接触极其困难。实际上，即使制成了触点，也很难将纳米材料的特性与触点的特性分开。此外，此类测量还受到再现性问题的困扰。因此，迫切需要能够快速可靠地提取纳米结构材料的电特性的技术。此类技术的可用性将极大地加速新材料的开发，并使基于这些材料的器件更快地推向市场。我们建议通过将光泵太赫兹探针光谱（OPTPS）技术应用于半导体纳米来解决这些问题。线，并通过开发精细模型从测量数据中提取最重要的设备特定电气特性。我们获得的知识将帮助我们开发基于半导体纳米线的新型光电器件。

项目成果

Electron mobilities approaching bulk limits in "surface-free" GaAs nanowires.

“无表面”砷化镓纳米线的电子迁移率接近体极限。

• DOI: 10.1021/nl503043p
• 发表时间: 2014-09-26
• 期刊: Nano letters
• 影响因子: 10.8
• 作者: H. Joyce;P. Parkinson;N. Jiang;C. J. Docherty;Q. Gao;H. Tan;C. Jagadish;L. Herz;M. Johnston
• 通讯作者: M. Johnston

Extreme sensitivity of graphene photoconductivity to environmental gases.

石墨烯光电导对环境气体极其敏感。

• DOI: http://dx.10.1038/ncomms2235
• 发表时间: 2012
• 期刊: Nature communications
• 影响因子: 16.6
• 作者: Docherty CJ

Simulation of fluence-dependent photocurrent in terahertz photoconductive receivers

太赫兹光电导接收器中注量相关光电流的仿真

• DOI: http://dx.10.1088/0268-1242/27/11/115011
• 发表时间: 2012
• 期刊: Semiconductor Science and Technology
• 影响因子: 1.9
• 作者: Castro

Ultrafast transient terahertz conductivity of monolayer MoS2 and WSe2 grown by chemical vapor deposition.

通过化学气相沉积生长的单层 MoS2 和 WSe2 的超快瞬态太赫兹电导率。

• DOI: http://dx.10.1021/nn5034746
• 发表时间: 2014
• 期刊: ACS nano
• 影响因子: 17.1
• 作者: Docherty CJ

Electronic properties of GaAs, InAs and InP nanowires studied by terahertz spectroscopy.

通过太赫兹光​​谱研究 GaAs、InAs 和 InP 纳米线的电子特性。

• DOI: http://dx.10.1088/0957-4484/24/21/214006
• 发表时间: 2013
• 期刊: Nanotechnology
• 影响因子: 3.5
• 作者: Joyce HJ