Proposal to resurrect femtosecond laser labs for probing electronic materials

复兴飞秒激光实验室以探测电子材料的提案

• 批准号: RTI-2023-00018
• 负责人: Kambhampati, Patanjali
• 金额: $ 10.53万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=747937
• 关键词: Proposal; resurrect; femtosecond; laser; labs

The requested instruments form an enabling role in our comprehensive integrated system for investigating charge carrier dynamics in optoelectronic materials. The Kambhampati group are world experts at femtosecond laser spectroscopy. The objective of femtosecond laser spectroscopy is to resolve in time the primary dynamical events in some chemical or physical process. In our group we focus on charge carrier dynamics in semiconductor nanostructures such as semiconductor quantum dots and semiconductor perovskites. Both materials are central to the emergence of materials for our energy future. Both materials have an electronic response in which the materials are favorable for both light absorptive applications like photovoltaics and light emissive applications like LEDs. Hence one aims to perform femtosecond laser spectroscopy in the electronic regime to be able to probe carrier dynamics. In our group we have a suite of three world class ultrafast spectrometers distributed between two femtosecond laser labs. In our first lab commissioned in 2005 we have a home-built pump/probe spectrometer. And in our second lab commissioned in 2015 we have a home-built two-dimensional electronic spectrometer (2DE) and a time-resolved photoluminescence (t-PL) spectrometer. Each of our three instruments represents the state-of-the-art in femtosecond spectroscopy in the electronic regime. But the instrumentation is aging and needs new components and sub-systems to bring the spectrometers back to operational readiness. The spectrometer in Lab1 is nearly nonfunctional as the majority of the components are damaged due to aging and use. The spectrometer in Lab2 is functional but needs a few key improvements to keep it functioning research ready at the state-of-the-art. These integrated systems uniquely enable our research and training to proceed.      Without the requested tools our entire research program that is funded by NSERC, FQRNT, and Sony is decimated. 50% of our output comes from the pump/probe spectrometer in Lab1 which is totally dead. 25% of our output comes from the 2DE spectroscopy instrument in Lab2 and the t-PL instrument in Lab2. Right now only the t-PL instrument is working as intended. The 2DE instrument requires a new hollow core fiber light source, and a number of additional components to be research ready again. The pump/probe instrument has been down for a year now due to poorly functioning pump lasers. More importantly we have many optics and sub-systems that are malfunctioning whether electronically or optically.      With the requested funding, we will be able to continue to do our main line of research into producing breakthrough results on the dynamics of charges in materials for energy applications. These tools will enable our training of up to 10 HQP at the PHD level per year. The HQP will be trained at the highest levels of academic science, but also connection to industries.

所要求的仪器在我们的综合集成系统中形成了一个有利的作用，用于研究光电材料中的电荷载流子动力学。Kambhampati集团是飞秒激光光谱学领域的世界级专家。飞秒激光光谱学的目标是及时地解析某些化学或物理过程中的主要动力学事件。在我们的小组中，我们专注于半导体纳米结构中的电荷载流子动力学，如半导体量子点和半导体钙钛矿。这两种材料都是我们未来能源材料出现的核心。这两种材料都具有电子响应，其中材料对于光吸收应用（如光致发光器件）和光发射应用（如LED）都是有利的。因此，一个目的是执行飞秒激光光谱学在电子制度，能够探测载流子动力学。在我们的团队中，我们有一套三个世界级的超快光谱仪分布在两个飞秒激光实验室之间。在我们2005年委托的第一个实验室中，我们有一个自制的泵浦/探测光谱仪。在我们2015年委托的第二个实验室中，我们有一个自制的二维电子光谱仪（2DE）和一个时间分辨光致发光（t-PL）光谱仪。我们的三台仪器都代表了电子领域飞秒光谱学的最新技术水平。但是仪器正在老化，需要新的组件和子系统来使光谱仪恢复运行状态。实验1中的光谱仪几乎无法正常工作，因为大部分组件因老化和使用而损坏。实验室2中的光谱仪功能正常，但需要进行一些关键改进，以使其在最先进的水平上保持正常的研究。这些集成系统独特地使我们的研究和培训得以进行。 如果没有所要求的工具，我们由NSERC，CNORNT和索尼资助的整个研究计划将被摧毁。我们50%的输出来自实验室1的泵浦/探测光谱仪，它已经完全停止工作了。我们的输出的25%来自实验2中的2DE光谱仪器和实验2中的t-PL仪器。目前只有t-PL仪器按预期工作。2DE仪器需要一个新的空芯光纤光源，以及一些额外的组件，以备再次研究。由于泵浦激光器功能不佳，泵浦/探测仪器已经停机一年了。更重要的是，我们有许多光学和子系统，无论是电子或光学故障。 有了所要求的资金，我们将能够继续开展我们的主要研究，以在能源应用材料中的电荷动力学方面取得突破性成果。这些工具将使我们每年能够培训多达10名博士水平的HQP。HQP将接受最高水平的学术科学培训，但也与行业有关。