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研究光电材料中载流子动力学的综合集成系统中起到了使能作用。Kambhampati小组是飞秒激光光谱学的世界专家。飞秒激光光谱学的目标是及时解析某些化学或物理过程中的主要动力学事件。在我们的团队中，我们主要研究半导体纳米结构中的电荷载流子动力学，例如半导体量子点和半导体钙钛矿。这两种材料都是未来能源材料出现的核心。这两种材料都具有电子响应，这两种材料都有利于光伏等光吸收应用和LED等光发射应用。因此，人们的目标是在电子区域进行飞秒激光光谱分析，以便能够探测载流子动力学。在我们的团队中，我们有一套三台世界级的超快光谱仪，分布在两个飞秒激光实验室中。在我们于2005年投入使用的第一个实验室中，我们拥有一台自制的泵浦/探头光谱仪。在我们于2015年投入使用的第二个实验室中，我们有一台自制的二维电子光谱仪(2DE)和一台时间分辨光致发光(t-PL)光谱仪。我们的三台仪器中的每一台都代表了电子体制下飞秒光谱学的最先进水平。但仪器正在老化，需要新的部件和子系统才能使光谱仪恢复运行状态。实验室1中的光谱仪几乎无法工作，因为大多数部件由于老化和使用而损坏。实验室2中的光谱仪功能正常，但需要进行一些关键改进，以保持其功能研究处于最先进的状态。这些集成的系统使我们的研究和培训得以继续进行。如果没有所需的工具，我们由NSERC、FQRNT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中的泵浦/探测光谱仪，它完全停用了。我们25%的输出来自实验室2的2DE波谱仪和实验室2的t-PL仪器。目前，只有t-pl仪器工作正常。2DE仪器需要一个新的空芯光纤光源，以及一些额外的部件需要再次研究准备。由于泵浦激光器功能不佳，泵浦/探测仪已经停机一年了。更重要的是，我们有许多光学系统和子系统出现故障，无论是电子故障还是光学故障。有了所要求的资金，我们将能够继续进行我们的主线研究，以在能源应用材料的电荷动态方面产生突破性结果。这些工具将使我们能够每年培训多达10名HQP的博士级别。HQP将接受最高级别的学术科学培训，但也将与行业联系起来。