Cryogenic Ultrafast Scattering-type Terahertz-probe Optical-pump Microscopy (CUSTOM)

低温超快散射型太赫兹探针光泵显微镜（定制）

• 批准号: EP/T01914X/1
• 负责人: Richard Curry
• 金额: $ 97.71万
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FT01914X%2F1
• 关键词: Cryogenic; Ultrafast; Scattering; type; Terahertz; Cryogenic; Ultrafast; Scattering; type; Terahertz

Technology underpins our society and economy and devices are constantly evolving, becoming smaller, faster, and 'smarter'. However, current technologies are fast approaching their physical limit and suffer from high, inefficient power consumption and poor energy storage. Integrated photonic, electronic and quantum technologies have the potential to disrupt these existing technologies, providing '21st-century products' with improved performance including energy efficiency. These devices will have a broad range of applications and will impact several sectors, such as healthcare, defence and security, ICT, and clean energy. Advanced functional materials, including graphene, 2D materials and semiconductor nanostructures, are the building blocks of these devices with the potential to deliver a step-change in performance through exploitation of novel quantum effects. An in-depth understanding of their electronic, photonic and spintronic properties, and how they may be controlled, enhanced and exploited is therefore essential.Although several characterisation techniques exist it still remains difficult to obtain a complete picture of their optoelectronic/spintronic behaviour. Often a combination of methodologies are required to extract device parameters, such as charge carrier mobility and lifetime; and these techniques have their own limitations - they can be destructive, only perform ensemble measurements, or only operate at room temperature and ambient pressure. Notably, material characterisation remains challenging on nanometre length scales, with the majority of techniques limited in resolution to the micron scale. As the majority of devices rely on controlling and designing electronic behaviour at the nanoscale (e.g. pn junctions), nanoscale spatial resolution is essential for accelerating device development. There is therefore an urgent need for state-of-the-art research infrastructure that can provide nanometre spatial resolution and combine the strengths of current methodologies to investigate materials over a large parameter range.The proposed investment will establish a new national facility for advanced nanoscale material characterisation and will provide the 'missing tool' required to conduct simultaneous imaging and spectroscopy at 3 extremes: ultrafast (<1ps) timescales, nanoscale (<30nm) length scales, and low temperatures (<10K). By combining ultrafast THz and midinfrared (MIR) spectroscopy with cryogenic scattering-type near-field optical microscopy, this facility will provide an exclusive tomographic tool that allows surface-sensitive, non-destructive optoelectronic characterisation of individual nanomaterials over a temperature range of 4.2-300K. As the THz and MIR frequency range encompasses the energy range of several fundamental quasiparticles (e.g. plasmons, free electrons and holes, and magnons), this capability will open up a new parameter range for investigating low-energy excitations in advanced functional materials, including III-V nanowires, 2D materials, topological insulators, and chalcogenides. It will allow differential depth-profiling and 3D mapping of the local dielectric function, electrical conductivity, chemical composition, stress/strain fields with <30nm spatial resolution, and enable investigation of nanoscale photoinduced carrier dynamics and ultrafast vibrational dynamics with <1ps temporal resolution. The facility will be unique to the UK/EU and will provide unprecedented capability for advanced functional materials research. Access to the tool will be made available to UK academics and industry undertaking research in this area. The system will be housed within the UK National Laboratory for Advanced Materials (the Henry Royce Institute) at the University of Manchester and will link with other key materials research infrastructure, such as P-NAME and Royce MBE systems, to form a key chain in the feedback loop between materials optimisation and device development.

我们的社会，经济和设备的基础不断发展，变得更小，更快，更聪明。但是，当前的技术正在快速接近其身体极限，并且遭受高效率，功耗较低和能源不良的损失。集成的光子，电子和量子技术有可能破坏这些现有技术，从而提供“ 21世纪产品”，并提高了包括能效的性能。这些设备将具有广泛的应用程序，并将影响多个部门，例如医疗保健，国防和安全，ICT和清洁能源。先进的功能材料，包括石墨烯，2D材料和半导体纳米结构，是这些设备的构建块，有可能通过开发新的量子效应来实现性能的逐步变化。因此，深入了解其电子，光子和自旋特性，以及如何控制，增强和利用它们是必不可少的。尽管存在几种特征技术，但仍然很难获得光电/自旋行为的完整图片。通常需要组合提取设备参数，例如电荷载体迁移率和寿命；这些技术有自己的局限性 - 它们可能具有破坏性，只能执行合奏测量，或者仅在室温和环境压力下运行。值得注意的是，材料表征在纳米长度尺度上仍然具有挑战性，大多数技术限制了微米量表。由于大多数设备都依赖于纳米级（例如PN连接）控制和设计电子行为，因此纳米级空间分辨率对于加速设备开发至关重要。 There is therefore an urgent need for state-of-the-art research infrastructure that can provide nanometre spatial resolution and combine the strengths of current methodologies to investigate materials over a large parameter range.The proposed investment will establish a new national facility for advanced nanoscale material characterisation and will provide the 'missing tool' required to conduct simultaneous imaging and spectroscopy at 3 extremes: ultrafast (<1ps) timescales, nanoscale （<30nm）长度尺度和低温（<10k）。通过将Ultrafast THZ和中红外（MIR）光谱与低温散射型近场光学显微镜相结合，该设施将提供一个独特的层析成像工具，允许在4.2-300k的温度范围内对单个纳米材料的表面敏感性，非破坏性的光电表征进行表面敏感性。由于THZ和MIR频率范围涵盖了几个基本准颗粒（例如等离子，免费电子和孔以及木元素）的能量范围，因此该功能将开辟一个新的参数范围，用于研究先进功能材料中低能的激发，包括IIII-V纳米含量，2D材料，2D材料，2D材料，2D材料，拓扑胰岛素剂和chalcogenides和chalcogenides。它将允许对局部介电函数，电导率，化学成分，应力/应变场的差异深度进行绘制，并具有<1PS临时分辨率的纳米级光诱导的载体动力学和超快振动动力学。该设施将是英国/欧盟独有的，并将为先进的功能材料研究提供前所未有的能力。该工具的访问将提供给英国的学者和行业从事该领域的研究。该系统将安置在曼彻斯特大学英国国家高级材料实验室（亨利·罗伊斯研究所）中，并将与其他关键材料研究基础设施（例如P-Name和Royce MBE Systems）联系起来，以在材料优化和设备开发之间形成反馈回路中的关键链。