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.

所请求的仪器在我们的综合集成系统中构成了能够调查光电材料中的电荷载体动力学的能力。 Kambhampati组是飞秒激光光谱的世界专家。飞秒激光光谱的目的是在某些化学或物理过程中及时解决主要动态事件。在我们的小组中，我们专注于半导体纳米结构中的电荷载体动力学，例如半导体量子点和半导体perovskites。两种材料都是我们能源未来的材料出现的核心。两种材料都有电子响应，其中材料对光伏的光伏应用以及LED诸如光伏的发射应用（如LED）都有利。因此，一个目标是在电子方案中执行飞秒激光光谱，以探测载体动力学。在我们的小组中，我们有一个分布在两个飞秒激光实验室之间的三个世界一流的超快光谱仪的套件。在2005年委托的第一个实验室中，我们有一个自制的泵/探针光谱仪。在2015年委托的第二次实验室中，我们有一个自制的二维电子光谱仪（2DE）和时间分辨的光致发光（T-PL）光谱仪。我们的三种仪器中的每一种代表了电子状态的飞秒光谱法中最新的。但是该仪器是老化的，需要新的组件和子系统才能使光谱仪恢复运行准备。 LAB1中的光谱仪几乎是非功能性的，因为大多数组件由于老化和使用而受损。 LAB2中的光谱仪是功能性的，但需要一些关键的改进，以使其在最先进的工作中准备就绪。这些集成的系统唯一使我们的研究和培训能够进行。没有要求的工具，我们的整个研究计划由NSERC，FQRNT和SONY资助。我们的输出的50％来自LAB1中的泵/探针光谱仪，该泵/探针光谱仪已完全死亡。我们25％的输出来自LAB2中的2DE光谱仪器和LAB2中的T-PL仪器。现在，只有T-PL仪器按预期工作。 2DE仪器需要一个新的空心核纤维光源，并需要进行许多其他组件进行研究。由于功能较差的泵激光器，该泵/探针仪器已经关闭了一年。更重要的是，我们有许多光学和子系统在电子上还是光学上出现故障。有了要求的资金，我们将能够继续进行主要的研究，从而为能源应用材料的电荷动态产生突破性的结果。这些工具将使我们在每年的博士学位水平上最多可培训10个HQP。 HQP将在学术科学的最高水平上接受培训，但也将与行业联系。